It depends if your a new player at the game. Dont try jungle in a real game. If you dont do well ppl will bully u alot! But, anyways If you like to go bot adc which is Attack Damage carry..Ashe and Sivir are very cheap adc that are very decent. If you want to mid I would highly recommend Ryze he is very op and cheap. In the top lane you would want to get Garen he is Very Very OP with his new update to him. Top is usally a tanky person but may be a high damage person to. And if you want to be support soraka is ur best bet. And when supporting u might wanna just let ur adc get the cs (minions) and build supportive items. Which usally recommended items are a good thing to follow by. Hope I helped! Oh and btw all these champs are 450 IP (cheapest price) Feel free to add me VG Cyrbq on League.

When you first start you should go play some bot games then get some IP, next when you afford it buy master yi then when you have him go top with him and start learning to play master yi after this you should start to be able to learn the game and start being able to play other champs.

If you need help add me Zebrwah. I would try and master Jungle, ADC, or support as those lanes are the ones less picked. If you master not lane first everything else should be easier. Add me and we can play.

Try finding some people in game that are nice and try and help you out, add them and roll with them you will learn some stuff from them and maybe you will even teach them some stuff.
Go onto youtube and look up videos of pro players playing and try and pickup some techniques from them, I dont recommend bot games, you will get better quicker by playing normals with real people

Don't be a chump go right into real games and learn from losing save up for 6300 champion than own everyone

pick an easy champ... like garen or ryze