First DBX build, input appreciated

Greetings, fellow commanders!

Got into the game recently and getting ready for my first long distance exploration. I lurked and googled around some and here is what I came up with.

I focused on jump distance, but still left a mining laser just in case. The cargo rack in Class 4 slot is a placeholder for future upgrades (Guardian FSD booster).

Questions I have:

1. How much do I really need all the repairs and maintenance stuff, assuming I fly safely? The last time I took damage was when I flew too close to a small black hole to try and distort a nearby star. And that was only because there was a carrier in the system so I knew I had a fallback.
2. What is the best strategy to farm some resources? I collected some stuff from degraded emissions and quite a few pirate encounters I've done to accumulate money, but had to go looking for stuff specifically on planets to do some minor upgrades to my weapons (other ship).
3. Most info I've found is quite dated, so maybe you can recommend some tweaks to my build?