It sounds like you want MechJeb, which removes a lot of the manual guesswork - it'll do automated ascent, descent, docking, hohmann transfers, etc. - I played vanilla for years but would always get tired of the tedious guesswork and was dubious about MJ, thinking it'd be game-breaking - but rather it's made the game 30x more playable and enjoyable, and doesn't sap the challenge one bit.

Only yesterday I ended up doing a return from mun orbit with bingo fuel by spinning a craft up to crazy longitudinal rpm and decoupling the descent stage at just the right moment.