Wow thats a lot of progress since I last checked on this thread. Nice work.
Annoyingly I’m doing some extremely intensive training for work for the next few weeks, and so have no time to do anything for myself such as looking at this forum.
A couple tips though that I constantly have to drill into my students;
Firstly, dont worry about fastener libraries online. Inventor has a fairly robust content center in the assembly field and you can add pretty much any fastener from that where Inventor will auto size it to the hole and everything, and show it as a bolted connection (useful for later testing and drawings if you do them). When you’re in assemblies, where you click on place, just click the drop down arrow below it and you’ll see place from content center.
If you wanna get real complicated you can use the bolted connection command to create all sorts of fasteners. The coolest part about it is you can put in the force required for the connection and Inventor will help find the fastener which best meets your needs.
In response to exporting Inventor files, Inventor can export in a bunch of different formats, including .STLs which are used in a lot of stuff. you wont get the editability like you will with inventor files such as .ipt or .iam, but it still is a great way to export (especially if you have a 3D printer)
Lastly, when you place your holes for fasteners or shafts and such are you doing it by doing a cut extrude or are you using the hole command? If you’re doing the cut extrude, stop now. The hole command will make things a lot easier/faster, and make assemblies and drawings a bit easier since the software recognizes it as a hole feature.
If you need any help with anything, do please message me. I’ll be more than happy to help, but because of my crazy schedule right now it will be a bit hard for me to remember to check this forum regularly.