I remember being in your exact spot, staring at STL files with no printer to call my own. What worked for me was starting with a few small test prints through a local service or something like Craftcloud—it let me understand scaling, supports, and material limits without blowing a budget on a big project that might fail halfway. Once I got comfortable, I moved to larger pieces, especially when I found high quality 3d models from places like Gambody, where the files are pre-supported and tested, which takes so much guesswork out. The key is learning the quirks of printing through small wins before investing time and money into a massive print that could break your heart.