We have certainly had a number of questions over the years on how to become a commercial pilot, so I'm not too concerned about that aspect being on topic.

The parts about this question which worry me are actually the 2 bits you put before a question mark

 - Is it possible to find a job as an airline pilot?: Of course it's _possible_ but there might be a lot of competition. I'm not sure how quantifyable this part of your question really is. Perhaps this part is too broad. It will depend on location, willingness to travel etc

 - A "well-payed" one?: Well, this is purely opinion based. What is well-payed? Is one person's "badly paid" a job that someone else will take just to get some experience? 

All in all, I'm not entirely convinced your question would be well received but there is only 1 way to find out and that is to post it. It is not entirely off-topic, and the community here will make a decision as to how appropriate they feel it is for our site. 

As an aside, just remember that if you start training right now, there might be a chance that COVID restrictions (but probably not the virus itself) are a thing of the past by the time you qualify with a commercial license.