[Baeocystin]

My suggestions-

First, buy a separate handle that you like the feel of. They're dirt simple to swap around between tools. If you're in a large shop, make sure it stays in your lockbox overnight so that it doesn't grow feet.

Second, although honestly more important, make sure you are using the right wheel for the job, with the right pressure (lighter than almost everything thinks), and stay focused on using either the edge or the face, depending on type. This will keep things smoother, slow disc changes, and improve safety by reducing the risk of disc shatter. Detailed explanation: https://www.youtube.com/watch?v=_n0TSF1i5os&t=162s

Hope that helps.

[edit]- When it comes to welding, I strongly recommend learning stick first, even before MIG. It gives you much better practice learning how to control the puddle without spewing metal everywhere. Bonus points in that it is also very inexpensive, and the welds themselves are usually stronger than MIG. Only disadvantage is speed, but for the types of projects you mentioned, that's not much of an issue. This guy's channel is great: https://www.youtube.com/watch?v=pMtqDWUpJds