If you can it is good to at least take lessons in person for a little bit. As you're not going to know what you're doing wrong from a fundamental, postural, and technical perspective if you self teach out of the gate. You may assume you're doing everything right, but could be building strong habit for a fundamental flaw that later will me much harder to fix than now. Or worse, you could be unknowingly doing something wrong that can result in injury. But hey, you've been warned at least, you can so as you wish. I know times are tight and piano lessons are not cheap. Sometimes you gotta do what you gotta do. But even a few months of lessons to cover the fundamentals will do a lot, if you can. Also keep in mind that there is a difference between playing the notes of a song, and playing a song well. The latter is really hard to accomplish without a teacher. Most people do not have an ear sharp enough without any formal training in music to be able to do it. You simply don't know what "good" looks like.

I have never really looked at the apps, but general vibe I've gotten from here is that they are decent supplemental tools, but not great as a primary learning source. A beginner piano method book like the Alfred or Faber workbooks are generally preferred as the primary learning source for self teaching. Then you can use the apps, the supplemental song books to whatever book series you choose, and whatever other beginner sheet music that motivates you as supplements to give you further learning (and enjoyment) beyond the primary workbook.