I've always dived at the exact same dive sites for a long time because I suck at navigations under water when visibility is anything less than ideal (read tropics clear water)
How do you not get nervous and/or get lost in 10-15 ft visibility in unfamiliar sites?
Please share tips/advice on improving my navigations.
Really, I can't believe it's 2021 and still there isn't any commercial easy-to-use under-water navigation system!
You're really new to diving, so it's natural to be anxious in good visibility, let alone bad vis.
You can however do things in and out of the water that can/will help.
Exposure: Set up a dive where you just practice navigation, but make it progressively more difficult. Start with taking a bearing to something at the surface, descend and do 10 or 20 kick cycles on that bearing. Then surface and see how you did. Keep doing this until you feel comfortable, then add some distance (another 10 or 20). Keep working until it's more natural.
Equipment: Most higher end dive computers have a compass that doesn't require you to hold the compass in near-perfect alignment to get an accurate reading.
Reframing: If you google reframing anxiety as excitement, you'll find tons of articles and research. The basic idea is you tell yourself that what you're feeling is excitement and view what you're feeling as a positive. Lots of professional athletes do this before a competition, and there's research that shows this to be effective.
You can learn to do all these things on your own, but you'll probably learn them faster with a good coach/instructor.