If my projector doesn’t have a vga input what can I️ use? It only has Rga

Solution
If your projector has 3 RCA jacks (Red, Green, Blue) then check the owners manual. If it can be set for RGB instead of YPbPr (component video) then you just need a breakout cable with VGA in and RCA outs.
Otherwise you will need an active VGA to component video converter.