termv

I would say, please consult Youtube.

Because changing a tire is an extremely low level activity and any advice given here should be accompanied with illustrations, hence the advice to consult Youtube.
Regarding tire brand, etc.

Maxxis makes some good tires.

Please for heavens sake give us more information, is it 16 or 20 inch.

We are flying in the blind!

Where do you want to go with this bicycle?

We have insufficient information!

You want our help.

I understand that.

But you have to understand we have difficulties in helping you with an incomplete set of information.

If you could post some pictures that would be appreciated as well!