| There are thousands of posts on this and other sites that address all of these issues (the 4Ps), all with different opinions as to their relative importance. You need to discover your 'balance'..that takes time, effort and a great teacher.
You're right..just blowing harder is going to aggravate things. The harder you blow with no result the more you mash that piece of metal into your lips. I think that it was one of the posters here (correct me if I'm wrong Billy) who posted recently that when it comes to air it's 'quality instead of quantity' when playing on a trumpet. I like that a lot...think I'll adopt that as well.
Regards,
Trevor |