Everyone says you have to get a weighted keyboard and that is just not true. You can learn to play fine on a 61 of 76 note board. What you have is what you have and if you can't afford a new keyboard then play what is in the cupboard. And if you want free lessons you can try YouTube. They will teach you to play the covers. Everything you need to learn is already on the internet. Theory, chords, scales etc. Just look for it.