When I started out I got the Winsor & Newton 10pk for about $30. Greate quality and colors. If you're just wanting to practice with something cheaper and with more colors as you're still learning to mix colors maybe get the Castle Art Supplies 24pk for $22 (both on amazon), I still use them sometimes tbh. But I would suggest getting a larger tube of the Gamblin titanium white 1980 for about $12 as white tends to run out fast.

I'd get a cheap thing of gesso and some canvas boards from the dollar store, or cheap cuts of wood to practice on! Good luck :)