Honestly bro, your gonna get yourself into the same stuff I did, I am 17, but have been sitting on my integra with a 2000 b18b1 since September of last year, Yes very sad but I didn't know what I was getting into, I think the thought of having a Honda excited me so I jumped on it, plus I'm having to do it all myself, so I had to learn and teach myself, but your starting off good by asking around, I'm nearly done due to me asking the people on this forum and a few others.
Just make sure you got the right tools and brains and help if needed, for this type of work, I can't even stress how hard it will be to convert to a MANUAL. It's A LOT more than shift linkage and a shift boot. Don't forget the little things. Clutch switch? Wiring in a clutch switch plug for the switch it self. It will be too much work and money. You are better off saving up for another integra or Honda(I would've chosen a hatchback honestly ) and then swap the motor for that. It'd be easier for one, as long as u get an Eg or Ek hatch, and the whole converting obd thing will be much easier. Take it from someone who is your age and has already made the mistake.
sounds like the engine would come with most of what you need. The passenger side mount is different in a 5 speed. I believe there are custom mounts out there now. I had cut one off a junked teg and had it welded on.