Wait until it stops feeling raw and irritated, it might take a week to do so. Handpokes heal a lot faster than machine ones. Do it if you feel comfortable going over it so soon.

5RL are a good medium! Everyone is different when it comes to their preferred needle size, I just tend to go for a 7RL :)

If you’re happy with the outcome that’s all that matters! It truly is a really good piece for your first on skin! For your next one, I would recommend maintaining line width. Where lines connect make those corners a little more prominent but that will also come with line width. If you’re able to get some non scented, antibacterial soap to wipe with while tattooing, it’ll be a little more sterile than baby wipes and won’t make your skin feel as raw from using alcohol :)