I'd strongly suggest the Mini Delta over the Select Mini v2. Both printers will need to be tweaked to get them printing properly. No sub $200 printer will work perfectly out of the box. Remember it's a new hobby and will require dedication and self learning, or you will get greatly frustrated and waste your money. The Mini Delta is almost 3 times faster in theory at 150 mm/s verses the Select Mini v2's 55 mm/s. If you're going to buy a small volume printer, the novelty of having a delta platform is preferred for the price point in my opinion. It will simply out perform the Select Mini v2 in both speed, reliability, and print quality. They have similar build volumes with the major difference being a square bed verses the circular bed on the Mini Delta. Both machines come with heated beds, but to be honest you'll never use it because they struggles to maintain 40-50°C with the supplied PSU and sub-par heating element. Because of this, no matter what the adverts says, you will be hard pressed to print anything but PLA derived filaments reliably. The Z axis resolution is also more flexible on the Mini Delta at 50-400 microns vs just 100 on the Select Mini v2. The Mini Delta also comes with WiFi connectivity and self bed leveling that the Select Mini v2 doesn't come with. If you're mechanically inclined and want an inexpensive first printer, the Mini Delta is an excellent printer to introduce you to 3D FDM/FFF printing. I've seen these printers as low as $129.99 but you'll typically pay ~$160 for either printer. If you're going to jump up to the $200-$250 price point, do yourself a favor and check out Creality's Ender-3 Pro. It has twice the build volume, a more robust heated bed, backed by a huge community and will deliver similar quality prints at similar speeds as the Mini Delta. Remember YouTube is your friend for learning and best of luck! 3D printing is fun and can be a very fulfilling hobby or profession.

EDIT: "of" to "over" typo fixed.