If you want a nice clean eyeliner, take your eyelash curler apply pencil eyeliner to the upper edge, press and hold your eyelash and hey presto, a nice clean line. Takes a little practice but it works!
Probably a You-tube about it as well.
When I get pro make overs, if I'm going out somewhere fancy. They do the eyes first then foundation. They never use foundation on the eyes.
Buy yourself some nice make up brushes and on this one cost counts, quality is what you are looking for.