Please take my hand and walk us new people thru this
You want to start with melt and pour soap. Glycerin soap began as "lye soap" that someone else formulated to be easy to re-melt/pour. If you haven't already looked into supplies there are lots of wonderful kits out there to get you started.
Basics you'll need:
Soap base - a block of soap formulated for m&p, there are many varieties
Heat safe container - do you want to microwave your base or use a double boiler
Mold - just about anything works as long as it's not too rigid
90% rubbing alcohol or higher - it helps to decrease bubbles after pouring
Other highly useful things:
Gloves/safety gear - you don't need as much as for other soaping methods, it's just good idea to have them
Thermometer - soap base can burn, you'll have to check your specific base for manufacturers recommendations
Scent/color/extra oils/additives - world's your oyster here, do a bit of research for personal preferences.
Soap Queen and Soap Fantasy are the only two YouTube channels with m&p that I watch, but there are tons more for examples on safety and methodology. I would recommend getting a kit to start out with, just about everything is included. Brambleberry has some good kits (and videos to go with some of them). wholesale supplies plus has a good selection. Michaels has some cheap kits to figure things out, they're by candle making at my local store (coupons and sales are your friends).
Even though I suggest Michaels I'd take it with a grain of salt. The kit instructions aren't very thorough and the extra supplies they sell are not the best.
Do some research. just about every soap supplier offers m&p options, find one that suits your goals