I recently got a 3D printer (late May). I got a CR-10S. The pandemic buying had crazy lead/delivery times on almost everything including the Prusa. I bought what was available locally. I had resisted getting one for years as I couldn't really justify one, i.e., "what do I want to make?".
Need #1: In January my Precision Matthews lathe had an issue with the threading dial and due to the pandemic issues, they were never able to source a replacement part or cost of a replacement assembly. Cost unknown. Delivery unknown.
Need #2: In April, a friend contacted me about prototyping a scupper part for a kayak. Sounded like a Fusion360 learning challenge.
Miscellaneous stuff to be made.
I designed the proto in Fusion 360 and resisting the urge to buy a printer, I sent it out to a printing service. The service completely dropped the ball and the order went unfulfilled. I finally decided to take the leap. I don't regret the decision. I have since iterated the prototype a dozen times, refining each step. Something I couldn't have done via a service. For my lathe, I designed a worm gear and repaired my PM lathe. Lathe is now working. (
https://www.hobby-machinist.com/forums/general-home-machine-shop-discussions.460/post-thread)
My advice:
If you know Fusion, you can design whatever you want or need. Generate the STL file and send it to the slicer program. However, not everything needs to be designed by you. thingiverse.com is an excellent source of free STL files that are print ready. No need to CAD something up. You can get test prints, calibration prints, mods to your printer, and general parts that may be of interest. You can spend a lot of time looking at thingiverse finding lots of things to print.
Slicer software:
I downloaded a free version of Cura from Ultimaker. It is very powerful and has done everything that i need for free. Simplify is supposed to be good but so far I haven't needed it and don't want to spend the money.
Printer and support:
I have found multiple Facebook pages directed towards the Creality machines. Lots of knowledge and help available. Problem solving on stock machines. What mods are worthwhile or not. I have done several mods on my CR-10s and am happy with my $410 purchase. Prusa's are supposed to be great but it depends on your budget and timeframe.
I also suggest looking at all3dp.com for good info.
Lots to learn but there's a lot of help available.
good luck