When I started out like you, I got myself a simple Spyder Victor. It was easy to maintain and was very reliable, and most importantly very cheap in paintball terms. Also, it out-performed the site Infernos easily and you know that it works because you've teched it yourself. Last Friday I bought a full setup including a Mini and a ReloaderB etc.
Just kinda a example of the kinda path you clould take: get a simple, cheap gat, get used to ho guns work and then upgrade later
Sorry for the essay
Jonny