Watch your step. I'll leave the hows and wherefores to you, but be careful.
I do an advanced and somewhat specialised version of the job in question for a living, and it's taken me a couple of decades to get proficient, from tig work to electronic and hydraulic diagnostics. That said, a lot of my learning, enjoyment and good stories have come from 'biting off more than I could chew' and then learning on the job. If you have aptitude and good work practices - especially knowing when to stop and call in a specialist or better tools - you can do alright.
On tools, yes Snap-On are good, but not that good. I can say on good authority that they are a little overrated, and too expensive.
For my basic tools, I use Wera and Hazet for spanners, Wera for screwdrivers, Knipex for all forms of pliers etc., Fluke for electrical, and Bosch for powertools. Irega for adjustable wrenches, and swathe of specialised tools from quality suppliers. Precious little made in China, and all carefully selected and maintained.
Learn your skills well, and listen to old hands carefully and humbly. All the best.
**Edit: when I say "overrated", I mean just that; rated above their actual value. I don't mean they are bad tools - I unreservedly acknowledge that Snap-On make excellent tools, and I would recommend them to anyone with bottomless pockets.
But there is an aura of worship which surrounds Snap-On tools, which goes beyond what the tools are actually capable of or useful for. For example Hazet spanners / wrenches out-performed Snap-On by a good margin in a German study of the raw strength of a wide range of tools from around the world. I personally find them slippery in the hand, and terrible when working with hydraulics, as the oil makes them near unusable in this respect.
Excellent tools? Absolutely. The best of the best by far? No. Worth the daylight robbery prices? I think not.
Your mileage, experience, and opinions may vary.