The StrongLifts program, while still pretty good, is not for absolute beginners. The app and the website has videos and detailed instructions, but that doesn't replace a human coach being able to point out in real time mistakes in your form that you do not even realize. And if you are a beginner, any attempt to do these exercises will invariably contain so many mistakes that they are not worth doing any more.

Just find a human coach. An app is not a substitute.

Or you could go with Starting Strength, which is similar and has some good information on the form of the lifts as well as novice programming.

https://startingstrength.com/get-started

never start with lifting weights except if you have somewhat athletic hobbies or if you did more than a bit of physical labor.

your joints and tendons can't do their jobs properly yet and you have no feeling for your skeleton and the correct positions of shoulders, hips and spine. your nerves will get pinched and your muscles will push to grow into their genetically intended position while you will bring nerves and tendons in bad positions due to habit.

joint strength, posture, bodyweight core training, 200 bodyweight squats in two sets, 200 pushups in 4 - 6 sets, 2 - 3 min hang from bar or rope (holding it as tight as possible all the time) and be sure you can roll forward and backward and wrestle with a big dog or young and strong child for fun on the ground without hurting yourself. now you can start lifting low weights.

I'm a big fan of Greyskull Linear Progression! I've always liked 3 sets of 5 more than 5x5.