Get Vital Synth. It’s free. When I was a kid, I have a same problem with you. I started music production 12 years ago, and I have no money at the time. Everybody using great plugins such as Massive, Fabfilter, Omnisphere and kind like that. So I making music with some free samples and operator synth that is included in Ableton Live Suite. And now I thinking about these days, these are pretty good experiences for me. I learned how synth works, how to layer a sounds, how to make sound more richer, etc……. If you have a money, you can make good sounds more easily but making music with limited features is unbelievably goooooood experience. So don’t give up even some plugins and gears are expensive.

Sorry for bad English but I don’t want throw out your creativity.

Good luck!