I want to make a website with a lot of features. Realistically, how long would it take me? I have no experience.

it would help if you described what you wanted. "lots of features" is very vague, especially since you're not experienced enough to know what features are simple vs complex.

if you use premade templates/tools/etc you can be up and running in a few weeks. if you want to code everything yourself, a few months/years depending on what you want.

I want to make a website similar to solomid.net, championselect.net, etc which users can register for tournaments.

this is the second time someone mentioned wanting to make a site similar to solomid.net which is odd because i've never heard of it before.

hit this guy up. sounds like he wants to create a site too, so ask how long it's taking him. it's been two weeks so see what progress he's made

http://forums.d2jsp.org/topic.php?t=67593927&f=120

Probably stole my idea from what I posted on reddit.

50 days of non-stop assault

Yep. I have never heard about it either, and yes, second one in a short time.