This is kinda of embarrassing, but how do you smoke a joint?

So I have been partaking in weed since around 2017. I normally only use Carts, edibles and tincture because I cant smoke in home and and flower makes me cough a lot with my asthma.

I got a free joint with a promotion at my dispensary and....idk exactly how im supposed to smoke it.

Usually with carts, just heat it up, take a puff and the puff will last me several hours.

So some questions I had:

1. The THC in the joint is around 48%. My carts are usually 89-95%. Is that the total % in the joint?

2. Do I smoke the entire joint at once? If I did, how many puffs of a cart roughly would that be equivalent to?

3. Can you put out a joint and relight it for later?

Any other tips or advice would be helpful.

*Update. Heres pictures of the joint for those curious

https://imgur.com/a/pT82NLT