What I found most convincing (after I was convinced that a god exists, mind you), is the historical evidence for the resurrection of Christ and the reliability of the New Testament documents.

I have here linked two YouTube playlists, which investigate the Resurrection and the reliability of the New Testament.
https://www.youtube.com/playlist?list=PL1mr9ZTZb3TUYymBPce08oyuhnHLLkR_B
https://www.youtube.com/playlist?list=PL1mr9ZTZb3TW70EEo4e2onJ4lq1QYSzrY

If you want to look at the evidence of the resurrection in particular, check out the work of Gary Habermas, NT Wright, and William Lane Craig (will link if you're interested). If you want more info about the reliability of the New Testament documents, check out Daniel Wallace (again, will link if interested).




Habermas:
https://www.youtube.com/watch?v=5znVUFHqO4Q
https://www.youtube.com/watch?v=ay_Db4RwZ_M

Wright:
https://www.youtube.com/watch?v=KnkNKIJ_dnw

Craig
https://www.youtube.com/watch?v=_NAOc6ctw1s
https://www.youtube.com/watch?v=4iyxR8uE9GQ
https://www.youtube.com/watch?v=oAxPHWF8aec

Wallace:
https://www.youtube.com/watch?v=6lEmch2OAhs
https://www.youtube.com/watch?v=XvR4zGnwRD0
https://www.youtube.com/watch?v=wiWKifMu6f8
https://www.youtube.com/watch?v=u0v6JItV5-w&list=PLFB1EE14B97D1F55E

Bonus round: J Warner Wallace (former professional detective studies the reliability of the New Testament claims):
https://www.youtube.com/watch?v=qzPOTeo9BR8
https://www.youtube.com/watch?v=nkllFXIsV6M

Sorry if I'm bombarding and alienating you with (long) YouTube links, but there really is so much evidence out there in favour of Christianity, you can't ignore it.