Would I be wasting my money to get a turntable?

So go for it.  You’ve self identified as one who places significant value on the aesthetics of vinyl, which renders sound quality issues as secondary 

Music Direct has the P3 on sale with different options that include a premounted cartridge. I’d get one with a cartridge unless you or a friend can install the cartridge. Your amp has a phono stage for mm or moving coil if I’m not mistaken.

I would call Music Direct and get their advice.

Mswale, I don’t know where you’re buying your used LPs, but someone is gouging you on the prices. Yes, for certain jazz LPs that have gained iconic status, and for perfect condition, one can pay $20 and up, way up. But other works by the same artists are nearly always available for $10 and less. Here I’m referring to high quality sellers who’ve preselected the records they sell to eliminate junk. From lesser sources, you can pay much less. I think one can assemble an excellent collection of 1000 LPs for $10,000 or less and over the course of a few years. That’s buying one or several at a time. 

To experience an old-fashioned style of entertainment occasionally— that's all. I grew up with LPs and Telefunken, but I don’t miss them anymore. The availability of decent LPs is a major issue.  A full year of Qobuz subscription could only buy 4 LPs.  

I also recommend the new Rega P3 with the Nd5 cartridge. And I would have to think hard to find a record I own or yet to own that costs more than $15 on ebay or discogs