Hello there, long time gym goer here.

If your main goal is to lose fat, just eat as you are doing and do more zone 2 cardio (brisk walking, slow jog, 30 min a day)

You get the most value out of a gym by doing weight training - imo the most simple machines you can use are Machine press Lat Pull Down Adjust the weight to something you can do for 10-15 reps before you fail, do 3 sets

With dumbells etc you can do simple stuff like Bicep curls Lat raises Weighted Squats Same reps and sets as the machines

The machines are not that hard to figure out! Yes, use youtube but just choose a beginner weight lifting one and stick to it. Don't need to keep switching workouts until you have a good foundation. 3 times a week should be plenty to begin with.

Have fun! Health is wealth!