about softsynth,many softsynths are actually similar in term of programming,and can create any sounds,the difference is the sound quality,the more expensive,the higher sound quality this softsynth can provide..massive,sylenth are example..
you just need 1-2 softsynths (so you should decide which one you like best and buy it) ,and the rest you need a sampler and mixing,effect VSTs + A fine DAW => then you can start your electronic music making career

(as a bedroom producer)
most people when making music,they make everything quick by using presets
they synth their own sound when they have free time...
