First time AR-15 owner. Looking to make some upgrades and need guidance

I’m pretty good at taking my guns apart and putting them back together but much less certain about buying parts and making sure they’re the correct ones.

I want to buy an ambidextrous safety as well as an ambidextrous charging handle. I’m super nervous about picking the wrong parts so I was hoping someone could assist me in telling me what I need to consider as well as maybe make some recommendations on parts. Thank you!