New to the server, got some questions

Hi! So I am normally playing on an other server, but I am really wondering to try the Nostalrius pvp server.
Because I see there is a very high population, I am really wondering if it is difficult to level up, or are there respawn time that follows how many active people there are in one zone?
Will I too often meet people of the other faction that will kill me, or will it be okey to level up without getting attacked 24/7 by the opposit faction?
-I also wonder, how long does it take to queue for a BG? Is there any big diffrence between horde and allaince when it comes to queue and whos winning most bgs? (And there is only AB, AV and WCG that is in vanilla content correct?).
-When I one day maybe become level 60, will it be easy do join raids etc. or do people have big req.ments? I for example have never done a level 60 raid, so I do not know any tacitcs, I have only played WOTLK.
-Do the server disconnect a lot, or lag a lot? (Is there many DDOS-attacks or problems because of the high population for example)?
-How do the server stay alive? I can see there is no donation shop or vote point shop stuff on this server, something I think is great. Even tho it makes me wonder how do they cover all the servers? I can see they asked for donations not too long ago, but does that mean the server is in trouble? And will it change, will people be able to donate later?
Because as I see the server has grown a lot in a very short time, how are they gonna be able to cover the servers and I am sure the population will increase even more. What will they do if the server for example gets out of hand, and they will need an extra server - will they have to open a donation shop?
-As the server is getting a very huge population, will they ever split the server, because as many know = huge population = even bigger population. Where will the increase end?
Thanks a lot for all answers, I am sorry if this is questions that has been answered many times before. I would also be very happy if there is there are any important about the server you would like to share with me.
(Sorry if many of the questions are dumb, but I like to know a lot befor I commit to an server. I'v been playing for the same private server for many years now, and felt safe with that).
Because I see there is a very high population, I am really wondering if it is difficult to level up, or are there respawn time that follows how many active people there are in one zone?
Will I too often meet people of the other faction that will kill me, or will it be okey to level up without getting attacked 24/7 by the opposit faction?
-I also wonder, how long does it take to queue for a BG? Is there any big diffrence between horde and allaince when it comes to queue and whos winning most bgs? (And there is only AB, AV and WCG that is in vanilla content correct?).
-When I one day maybe become level 60, will it be easy do join raids etc. or do people have big req.ments? I for example have never done a level 60 raid, so I do not know any tacitcs, I have only played WOTLK.
-Do the server disconnect a lot, or lag a lot? (Is there many DDOS-attacks or problems because of the high population for example)?
-How do the server stay alive? I can see there is no donation shop or vote point shop stuff on this server, something I think is great. Even tho it makes me wonder how do they cover all the servers? I can see they asked for donations not too long ago, but does that mean the server is in trouble? And will it change, will people be able to donate later?
Because as I see the server has grown a lot in a very short time, how are they gonna be able to cover the servers and I am sure the population will increase even more. What will they do if the server for example gets out of hand, and they will need an extra server - will they have to open a donation shop?
-As the server is getting a very huge population, will they ever split the server, because as many know = huge population = even bigger population. Where will the increase end?
Thanks a lot for all answers, I am sorry if this is questions that has been answered many times before. I would also be very happy if there is there are any important about the server you would like to share with me.
(Sorry if many of the questions are dumb, but I like to know a lot befor I commit to an server. I'v been playing for the same private server for many years now, and felt safe with that).