First year college learning robotics is good. I congratulate you for that leepanares.
Nangutana ka kung ok ra ba ang sensors nga imung gigamit. Depende na sa imung kailangan. If concerned ka sa cost, makaya ra nag 1 ka sensor (pwd ra gani IR). Ang pic nay mag-da og operations ana. Pero dapat kabaw sad ka sa sensors nga imung gipanggamit.
But then, you should have at least basic knowledge on combinational and sequential circuit. And you should be knowledgeable enough on PIC programming or any microcontroller programming. If wala kay alamag ana, try to learn them online. If dili ka makat-on, undang nalang ana. But it is good for lingaw2x thing.