Hello laura lily,
I would recommend looking at many guitars before buying and in many cases you do get what you pay for. Depending on the sales staff, you may feel some pressure to decide and buy. Don't give into it. Search online a bit and see if you can find a store that sells used instruments as well- you can get some great deals at stores like that. Seagull makes some great guitars, but depending on your budget you might try looking into slightly less expensive, but good brands like Alvarez. Check out different styles (dreadnaught, parlor, concert, etc.) and- assuming you're right-handed- see how they feel under your right arm and how the neck feels in your left hand. Go ahead and grab on and go through the motions of moving arund the neck and strumming. An uncomfortably fat neck or wrong radius or a challenging reach over the lower bout can make a huge difference and limit your enthusiasm. Since you're just starting out, fondle as many guitars as you can and keep an open mind- much like adopting a new cat- let the right guitar choose YOU. Even if it's a bit more expensive and might take a down payment and a few months to pay off. Believe me, it's worth the effort. Nothing will turn off a beginner and negatively influence the learning experience faster than a lousy, ill-fitting guitar.
A word about instructional resources. I searched YT and alot of other guitar instruction websites and GT is the one I've settled on. The tutorials are well-paced, clearly delivered, and the instructors are very professional. What I found on YT and many other sites are a hodge-podge of song and riff collections that have no structure and many of them are just plain wrong. I recently watched a video purporting to competently cover the solo from The Beatle's "Nowhere Man" on an Epiphone Les Paul and that guy wasn't even close. He didn't even realize that it's an arpeggio-based solo using nothing but augmented and suspended chords- trying to play it as a series of scale riffs. At the risk of sounding overly-critical and condescending, he should've searched for videos of George Harrison playing it before splashing his ignorance across the world on YT. I see this kind of intellectual pollution on YT on an all-too-frequent basis.
I'm not on GT's advertising payroll, but I can tell you that after searching online and hiring private instructors, Guitar Tricks' Core Learning System is the one resource that has given me the best results. Try it!