Is this tripod trustworthy? I'm no pro but i'd like something to last a few years for when I get to try out astrophotography. Or is there anything better on the prime day deals that you'd recommend for under $100?

There are dozens of decent tripods at that price. Then buy an iPhone holder for $20 - all on Amazon. I have this. It’s fine. Limited-time deal: K&F Concept 64''/162cm DSLR Tripod,Lightweight and Compact Aluminum Camera Tripod with 360 Panorama Ball Head Quick Release Plate for Travel and Work B234A1+BH-28 (TM2324) https://www.amazon.com/dp/B015CGRREI/ref=cm_sw_r_cp_api_i_dl_J1Z2SDXPKJQAVZGK8HTG?_encoding=UTF8&psc=1