The problem with shooting pistols well is instruction. Its a difficult thing to do well, and no beginner knows how to do it properly. I'll add to that, very few experienced shooters now how to do it properly either. Even if a person is shooting 2"groups at 20m, is that evidence they are doing it properly or capable of instructing?
This isn't a shot at recreational shooters..the sport is about having fun, and everyone has fun at different levels of skill and commitment. However, if you want to get serious, here are some thoughts.
Handgun shooting is not unlike golf. You can make yourself 'better'at golf or shooting but you will never make yourself 'great' at either without learning fundamentals first and not developing bad habits early. I watch a new shooter or golfer do something wrong right off the bat, and then correct that by doing something equally wrong that 'works for them'.
IF you choose to get advice from a shooting partner I would watch them shoot for a good while first, and I would subtlely inquire who taught them to shoot? There is no faster place to watch disinformation fly, myths persist, and bad information get passed around than a gun range.
Observe people shooting at a range..you will likely see each shooter set up a target, shoot a bunch of holes in it, take it down, review, and dispose. This is a usual trip to the range. No marking, no grading, no drills, no off hand shooting, no logbook, no reloads, no timers..you name it..there is no structure to an average shooting session with a recreational shooter. At the end of the session..how does that shooter know if they have shown any improvement? How have they challenged themselves? Have they reinforced proper technique or are they one week deeper into their bad habits and poor technique?
95% of shooters think they are in the top 5%. I did too..because I was better than everyone around me and anyone I brought out to shoot with me. Then I took an actual course, with an actual Instructor, and basically went back to day one. It was humbling getting my long developed technique get broken down by a Provinvial Champion IPSC instructor. He likely made me a worse shooter in the 20hr course..my accuracy and speed went to pieces the first morning. But he set me straight..and I did it 'his way' from then on. I used the fundamentals from then on, and used drills and scoring and timers..instead of just throwing lead and hoping it would go in the middle.
Short version..I wouldn't trust anyone without actual instructor credentials or competition experience to show me how to shoot. Not to say you can't pick something up here and there..but the fact is without actual instruction, from actual instructors, and without comparing yourself in real time to well trained and experienced shooters..everything else is just guesswork. I spend alot of time on a gun range, and alot of time observing shooters of all skill and commitment levels, and generally, a Sunday target shooter and social shooter has no idea of how good or bad they are, has had no instruction past getting their license/ATT..and learned everything they know from the guy beside them, who learned from the guy beside him, etc.
If you can, or are comfortable, find an IPSC Black Badge course. IMO, its the most likely place to run into an experienced and well trained instructor, and get 2 days and 500+ rounds of experience and oversight. Compete or not, take away the lessons and the drills from that weekend and build on them/ practice them. Having taken PPC, IDPA and IPSC courses (all of which were valuable) by far the IPSC course developed skills best, provided useful drills to take forward, and opened the most doors to compete, practice and continue learning from very competent practical shooters.