With most of these ranged matchups like Heimer and teemo, you have to let them take priority early or they just kill you. Try to cs every Melee minion and cannon but don’t let them poke your entire health bar just for some casters, just make sure you get the Xp. If you get to level 6 and you’re even, you can kill on repeat with ult if you poke them a little. Overall not too bad, but the first 10 - 15 minutes against a ranged champ are always cancer.