Gravel bike advice

I don't think anything at dicks is going to be a solid bike to be honest.  I'd look locally at used gravel bikes that are much more legit and well taken care of.  My Marin cx bike was roughly $2500 brand new and it came stock with carbon fiber frame/fork/seat post, disc brakes, decent Shimano 105 components.  I'd think you could get a really solid used gravel bike for 1-2k.

YZ133…

I was up visiting my son & his family in Aberdeen Md. last summer, and I drove over & participated in the “Bikes & Beers” cycling event one Saturday in Hershey Pa, (great time & Well organized tour!) and I got a raffle ticket deal on one of those for half off! 
I went ahead and did it for $400 bucks and frankly it is -adequate- for my son riding around the neighborhood with his girls, but to be honest, it is GAWD-awful heavy, prolly pushing 40 pounds and the Chinese knock-off SRAM shifters left a LOT to be desired! Not to mention it does NOT have a decent rear hub/cassette body with the ability to quickly & easily swap cassettes…
I ended up swapping it over to some 7-speed Shimano Flat bar shifters I had laying around and took off all the reflectors, misc junk adding dead weight, put on a nicer seat I already had & his Shimano M540 pedals etc and its getting ridden for fun around the house with his kids, but I just would NOT consider it the bike you would want to try & do any legitimate hours of training on! 

If you’re planning to do any kind of training at all, I would frankly recommend putting that $800 toward something in good shape used! $800 bucks will go a long way toward getting a pretty decent “real” bike on Marketplace etc 

We pretty much figured out that Schwinn bike is NOT the quality bike Schwinn was 40-50 years ago and I am glad I didn’t pay more than $400 bucks for it!

Good luck with your decision! 😎 👍❗️

You should have no problem finding a much better used gravel/cyclocross bike in the $800 range.
That Schwinn is NOT worth $800. Those brakes and drivetrain are poor quality and you will regret not having a carbon fork. The vibration of aluminum forks on gravel is the worst. 
If you really want to keep the price modest but still want a reliable bicycle, I would suggest a Poseidon. 

https://www.poseidonbike.com/products/x-ambition-dropbar?variant=439189…

Specialized diverge is my gravel bike.

Shock absorbing headtube, and seat tube.

Comfortable as hell.

Can even rip up some moderately difficult singletrack. 

Is a Gravel bike the equivalent to an Enduro? Not really good on the street, not good in the dirt either…….

Ha! That’s funny & pretty true about the enduro MTB too! (the only one I have had was too heavy and clunky for XC riding, and too flexy & limited travel for DH stuff! Sold it and have dedicated XC & DH bikes)

However, the Gravel bike is actually a solid rig and works well on any surface! 
When the wife & I travel these days, I always throw in the gravel bike and two wheel sets, one set up with off road tires, and one with a road tire…This set up serves REALLY well as I can go off road, even modest single track, or put the road set up on and sit in on club rides or T-shirt tours with no issue!

Frankly…my gravel bike gets a TON of action, and my Cervelo S3 ends up collecting dust! 
😎 👍❗️