Dump Stat Adventures goes through some of the basics of worldbuilding, including some different methods for approaching the beginning of your worldbuilding process.
So you’ve been able to successfully recruit somebody into the demonic cult, I mean hobby, that is Dungeons and Dragons. First of all, congrats! That is by far the most difficult part – at least in theory. The next step, and in fact many of the subsequent steps, is figuring out how to turn random dice rolls into a character who is ready to adventure and explore the realm.
So you've played all the roleplaying systems out there, or just think you have a great idea for a TTRPG, and now want to start putting it all together. How To Be A Great GM goes over some tips for the process of creating your own TTRPG.
Towns are probably the most balanced location for Dungeon and Dragons stories. They are not too big like the cities or small as villages, yet towns strike a perfect balance in their scale. Dungeon Goblin walks through some techniques for creating your own towns.
Sly Flourish's Mike Shea goes over the wonderful lightweight virtual tabletop owlbear.rodeo, showing off how to use some of its most important features and more.