Learn how to take an file off Thingiverse.com and customize it for your needs.
If you're looking for the best budget 3D printers, it's really hard to beat the Creality Ender 3 or 3 v2.
Ender 3 - https://amzn.to/3GkqiZy
Ender 3 v2 - https://amzn.to/3TFjVmE
I get consistently good results with Hatchbox filament, but you can also save some money with Sunlu.
Hatchbox Filament - https://amzn.to/3UZ30wl
Sunlu Filament - https://amzn.to/3gb6RYE
Here is an excellent Tinkercad tutorial
• TinkerCAD - Tutorial for Beginners in...