Hell, even 8sp Claris is good these days. My first road bike was a new $650 aluminum 2014 Defy 5 with 8sp Claris. I wore the chainring and jockey wheels out by 5,000 miles and upgraded it to full 11sp 105 for a little over $300. To this day it gets used nearly as much as my 2015 carbon TCR, but its relegated to mostly winter and wet riding now.

I just bought a 2017 Giant 'gravel' bike with 10sp Tiagra. It is slightly 'clunkier' sounding when shifting than the 105 groupsets on my road bikes, but it has the same high and low trim features, i.e the same functionality except one less gear.

To the point, as said above this most likely won't be your only road bike, so my recommendation would be to buy something of moderate cost that fits you properly, ride the heck out of it, and 1.) put away the money saved to later buy all of the goodies you probably don't even know you want yet (clipless pedals and shoes, GPS bike computer, power meter, smart trainer for Zwifting in bad weather on-and-on-and-on speaking from experience), and 2.) use the experience gained from riding this one to allow you to determine exactly what you want in you 'nicer' road bike, i.e would you be satisfied with a decent stock carbon bike with moderate groupset or do you want to go all out and get 'the best'?

Keith