That's cool, you are at least thinking the right way about getting a low cost bike to make sure you want to do this sport. I will say this, if you get a low cost bike I would, before you ride it, take it to a bike mechanic and have them go through it and adjust everything, sometimes things come out of the factory screwed up, like failure to lube a bottom bracket before assembly, yes that's happened in these forums; or a chain with a stiff link that tore the rear derailleur off the rear stay, these sorts of things you don't want to happen while riding on your first day! LOL!! Also the bike may not come tuned up correctly so shifting and braking etc may be poorly functioning.
Saddles on low end bikes are usually very uncomfortable, they'll be ok for riding around the block but on long rides your bum may start to hate you, more then likely at that point you may need a new saddle and that saddle will have to fit your sit bones so you have to have those measured which most bike shops can do so you get the right size.
You need to adjust the fit of the bike, do it yourself and save a ton of money form a pro fit that wouldn't make sense on a $200 bike anyways. This is the first spot to work on; see: http://www.bikeradar.com/road/gear/article/how-to-get-your-seat-height-right-14608/ And this site: https://cyclingtips.com/2010/04/science-of-bike-fitting/
Make sure you adjust your PSi properly by using this calculator: http://www.dorkypantsr.us/bike-tire-pressure-calculator.html Scroll down and Use the second one, not the first one, enter in your total clothed ready to ride body weight, and your bike weight, enter your tire size and the correct PSI (correct within 5 psi anyways) will show up automatically.
Also keep in mind, that a nice road bike will feel a lot better than a low end one does, so if you get frustrated due to some sort of comfort problem that could go away with a better bike. But like you said, this bike will get you started, but try not to relate comfort with failing not to like riding bikes, here's a story: I saw a bike at a garage sale about 5 years ago, turned out to be a unused 1985 Fuji Club, unused you scream? not completely unused, the owner bought the bike on sale from a bike shop who said that was the right size bike for him, he rode it about 5 miles and hated it so he put in the attic all those years. When I heard his story and saw the bike and him I knew what the problem was, he was too short for the bike, evidently the bike shop was selling off their year end stock and sold a last remaining model of a bike to the first sucker that came along without checking to see if it would fit, then lied and said it was the right size for him. So here's a guy who never rode a bike again because the bike was uncomfortable for him, if the bike shop had done it's job he may have ended up liking riding. He was shocked when I told him the bike wasn't his size and that's why it wasn't comfortable. So I picked up a brand new 84 Fuji Club for $40, good deal for me! he paid $349 for it in 85.