During Lane you should focus on securing/denying souls. Always look for opportunities to do safe damage to the enemy. Getting kills is - while very good feeling - don't give you much, unless you capitalize on them. Do damage to their tower (MOBAs are games about destorying building btw) or reclaiming your side of the lane. Your spells also allow you to quickly farm tier 1 jungle, so take them BETWEEN creep waves. If there are creeps on the lane - you should be there ready to deny and push. Don't go to shop if you can push, don't go to farm jungle if you can confirm a kill - focus on the objective and the people defending it. Farm makes you more powerful, but it also leaves your tower defenseless