One Drawing for Each Day of Summer Vacation!

So I am going to try to draw a drawing every day for my whole Summer Vacation (2.5 Months) and I haven't drawn seriously in a LONG time even thought I own a tablet, albeit an old one.

So what I wanted to ask was,

any tips on what to draw to improve my skill?

What are some nice brush, color, etc. Settings you can recommend for drawing in photoshop?

Do you think this sounds like a good idea for improving?

In your opinion, should I stick to drawing or tablet or go back to drawing on paper?

Thanks in advance for answers!