Welcome. I'll toss some general advice out there - it's all over the forums as well, so you can find more detail by poking around.
1. Find sounds you like in the Axe and modify to your taste. Don't start off trying to compare/copy a live amp sound right away. Too many 'disappointment' stories start there. This isn't for everyone (and that's okay) but for 98% of the folks here, it does everything and more of what they want.
2. It can be complex. Just ask here if you have questions. Don't expect to walk in the front door and know all about it.
3. You don't need any cab packs. They offer a bunch of new, quality sounds and there are thousands of them. There are plenty of great cabs in the Axe and for free. While they can change your sound, it's not improving quality, only variety. I'd hold off on purchases until you get on your feet - then if you hear something you feel can add value, jump in. They're easy to use. The Recording forum has a bunch of folks showing off what the Axe and cab packs offer. Spend some time there.
4. Firmware updates can change your sound. Accept that or don't upgrade. Some people make a ton of custom sounds and it can be quite painful, some folks make few custom changes and upgrading is very simple. Nobody wants to firmware improvements to stop, so this is just part of the Fractal life.
5. If you find you like cab packs, cab lab is a worthwhile investment.
6. The guitar and pickups do make a difference. Some presets sound great with one and not so great with another.
7. There are a couple of Masterclass videos by cooper carter that are great and he's amazing with the Axe.
8. If you are going to play live, ask people who do that what they do to 'stay safe'. Learn how to avoid disaster before you experience it. Stuff like "don't upgrade your firmware right before a gig." "How do I backup all my presets".
9. If you don't act like an ***, you'll find unbelievable advice, help & support from the people here.
10. Have fun. Rock on...
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