Hello! I'm a new DM, new to table-top gaming general actually. I'm 15, and some friends and I decided to finally start doing the campaign we've been telling each other we're going to do for about two years now. The problem is; I have to DM, I HATE being in charge like this, I have a horrid stutter, I don't enjoy talking. Creating dungeons, NPCs, and plotlines is wonderful, I LOVE world-building, I just don't deal well with the party. There's a few key issues I'm having with the party however, and I need some advice.
---The Party refuses to buy books--
There's only 2 out of 5 people, (myself included) that own rulebooks.
We have 2 copies of the core rulebook, one is my own, and one of the other players went and got one, I purchased a game mastery guide, and a bestiary, but the 2 copies of the core rulebook really slows down sessions, people are always asking to pause so they can barrow one of the copies, it really bogs combat down. What's more, 2 of them don't have their characters completed, they don't fill out their character sheets other than the name, class, level, and core stats.
--The Diversity of the party--
The maturity range of the party is incredibly vast, I have one player that would like for me to expand on the detailed history of the war that ravaged the land the party is currently in. However I have another player that wants to "bonk the man on the head and get drunk". When I sat down to create our party's adventures, I was getting inspiration from A Song of Ice and Fire, The Wheel of Time, and the Warhammer universe, however, half my party wants flying narwhals and exploding monkeys. Some of the party wants the really role-playing intensive campaign I had planned on, and some of them want to run around like Monty Python.
--The Party is steam-rolling through encounters--
Something is wrong with the way I'm building encounters, and I have no idea what. No matter how many goblins I throw at them, or twists, or traps, the party seems to cut them down with ease. I never intended a Dark Souls level of difficulty, but I wanted death to be a very real threat. It's also hard because my party is really, really, creative. If I include a statue in a room, the Mage will shoot magic missiles at the base, then knock it over onto the pot of boiling oil, knocking it over into the Hob-Goblin chief, setting him on fire, then using telekinesis to pick up the rubble, and sling sections of it at him, knocking him into a pit.
I don't know if it's something I'm doing wrong, but I just need some serious advice. Thank you! ^^