Hello stamp1learner, welcome!

I am having fun just looking at all the stamps! Since I used to collect worldwide but now just a few here and there , there are some I have not seen for many years. Thank you.
Most of what you have posted so far are, unfortunately, not too expensive. There are some that are worth a bit more and sought after too (which makes them more valuable) like the Great Britain (GB) QEII (Queen Elizabeth II) Red Cross issues. Many collect Red Cross or Croix Rouge.
The collectors who go after the more expensive stamps would perk up and ask for closer scans right away if they saw anything of major ($1000) value I am sure. And I would also. It is nice to see stamps and the rarer ones are seen rarely so very nice to see.
Part of the value in stamps is knowing who they were
inherited from and the time and effort and care they put into their collection.
There is also the study. There are watermarks on some of your stamps, perforation (around the edges) differences, paper type differences, colour shades, small errors in printing sometimes, different cancellations or postmarks, etc that can make the hunt and chase of these varieties a fun thing.
In some of what you have shown, there may be a few that are worthy of further study. I do not know all stamps and most people do not either. There are catalogues (at the library or to buy used) that would help you identify stamps and value them but catalogue price is not street price.
Keep posting please. There may have been a country or contries that the former collector had more interest in and thus spent more money on or even had stamps sent to him or that he
inherited himself.