hi.
go on pandotracker.me,
get qBitTorrent and get as many maps as you can. Keep playing and try to not put yourself down too much. Play as much as you can, but try to have a life outside of the game too, even if it isn't anything super special.
for some info, pandotracker hosts torrents of all the beatmap packs for different gamemods, including classic/standard. it is safe, don't worry. I think there's a forum post on Gameplay & Rankings posted and pinned too.