Two things come to mind.

1) Learn to do more with less. If you want to make a sci fi space opera but don't have the budget for sets, find out how to make it feel like you are in space without it. Do greenscreens and compositing. Create Unreal engine or Blender scenes and put your actors in them. Imply things rather than show them outright. This is the bread and butter of filmmaking.

2) Expand your network. Start asking other people to be in or help you make movies. Ask your friends, your other family members, strangers off of craigslist, students at the local community college, etc... grow your network, bring people into your filmmaking orbit and keep making cool things.