Suggestions on first build

Agreed, if you want a single 18650 thrower, the C8 is a great choice. Here’s a link to my C8 mod in case you’re interested: Convoy C8 Mod - The WOW Factor.

If you want a more compact thrower, you could also go with a Convoy S2 or a S2+ with a Cree XP-L HI LED. The S2 has a deeper reflector than the S2+, so more throw.