I'm level 14 and my main is ashe. I mastered her already. My problem is i dont have any other champions in mind and most of the time the position as adc is taken . I have played jinx adc, leblanc mid, tristana adc but never as top ,jg or support .
Help me by suggesting 5 champions as adc, supp, top, mid and jg.
Thankss 
If you want to keep playing ashe then don't let people stop you from going other roles with in reason. Take her top, mid and if you practice kiting camps enough even jungle. Those are off meta picks obviously but they are within reason so try them out. By within reason I mean something with 0 chance to work such as ashe support.
I like Ashe too :) Here's some easier to play champs you might like:
Top: Shen, Dr Mundo, Darius Jungle: Warwick, Rek'sai (she's a lot easier than she looks) Mid: Vladimir Adc: Sivir
Personally I think if you have mastered Ashe you might be better with ranged champs rather than melee.
Mid: Although skill shot why not try lux mid as she has so many cc and deals good scaling damage. Also fun wise I alwyas love playing fizz he's a melee so you can used to close combat but has enough movement to escape/chase and of course his trident is often entertaining.
As a support Sona is great for new players no skill shot required (except r) as she just has an aura around her and her q will give you enough damage to survive if you get in trouble but if you prefer tank sups leona is good bet lots of cc but I would look to what the adc player is for example Leo works well with someone like jinx who can snare behind the champ when leo stuns.
Adc perhaps Caitlin? Lots of range, has escape/chase with her e and deals ad with her r (Ashe deals magic with r so Cait has great r damage with build)
Top: that will depend if you want more of a attack person or defence, malphite is pretty good as he's a tank can take the damage but with right build can deal some magic (where's a lot of top tend to build armour not magic resist) I haven't played Jung much so I will leave others to suggest! Lots of champs arnt just for one lane mix it up a bit and just have fun good luck :)
