Welcome
You can start by reading the e-books on this site and read through most of the posts on here. There's a lot of good info on here.
Check out your local library for books on casting, some authers are Ammens, and Chastain and others.
websites.
www.foundry101.com/ You-tube videos
Look around there's lots of stuff out there. I think most of us built our own furnaces out of metal buckets or propane tanks. We have a lot of fun melting stuff.
Just amke sure you be careful, this is not very forgiving if you make a mistake.