Hi adelaar,
I assume you are playing tournament poker.
I am just working to create preflop, flop, turn, river focus drill masterlist.
Watch video bellow to learn more about it and you might try create your own masterlist what is maybe some simpler then mine and add things when you understand them better:
http://www.pokerstrategy.com/video/27186
Preflop part what is posted in 1st page probably is tiny part of masterlists coming, so keep updated.
Honestly huge % what i have learned and know at the moment come from 1 on 1 couching with personal couches. If you can afford it i recommend find personal poker couch and hire him.
https://www.pokerstrategy.com/forum/board.php?boardid=1518
If you have winning/breakeven poker graph and can put good volume in you might want join staking team where you mostly get free couching and bankroll but need share your profits.
https://www.pokerstrategy.com/forum/board.php?boardid=1554
If you have no lot time for poker or you are really new to poker books and videos probably is best choose. PokerStrategy videos is very good, i have no much experience with much poker books so i can't give you good advice on them. You might search advice about poker books on pokerstrategy or twoplustwo.
You can google also other poker training sites but most of them will be paid.
About tools, you probably should have Poker Tracker or Holdem Manager for HUD and hands re-player.
I use Equilab for equity calculations in different spots.
If you are going to play tournaments you might want get ICM calculation such as SNG Wizard or ICMizer what cost some money but definitely is worth it long-term.
Overall, if you can invest money in poker resources or get into staking team you will learn lot faster but if you can't afford it or can't spend lot time for poker videos and books is best places to stay. But overall it about how hard you are going to work with your studying materials whatever them are, even if you get best couch you will no improve that fast if you are getting lazy and are not motivated to push yourself.
Hope it helped.
Feel free to post any questions you have here and i will try reply them as good and fast i can.