Hmm, I've only been shooting for about 6 years, but so many have passed through my hands (not all have stayed), and many came pretty quickly those first 2 years, that I'm not sure I can give you the list in order. IF I think really hard I can probably give you the right order the handguns came and the right order the long guns came- but to put both long guns and handguns together, I'm not sure I can do it.
1st handguns:
-Taurus 82
-Ruger KP89
-S&W 65LS
-Charles Daly 1911
-(I"m not 100% sure which came next- I think it was my CZ 75B)
1st long guns (I'm not sure the order, other than the Marlin was my first gun of any kind, but I think this is pretty good):
-Marlin Model 60
-SKS
-30-30 Winchester 94
-Mossberg 500
-Remington 581 (.22lr bolt rifle)
I sold the Mossberg when I needed money, I sold the Remington because while accurate and reliable I never really liked it. I was stupid and sold the Taurus 82 shortly after I bought the S&W 65LS (I didn't plan to own more than a couple guns back then) and I was smart and sold the Ruger KP89 when I got the Daly (a month after the S&W).
What would I do differently? I'd get a .357mag K-frame S&W or Taurus 65 or 66 instead of the Taurus 82 (I wanted a .357mag, the .38spl Taurus 82 didn't quench that desire, and since I didn't think I wanted to own more than a couple guns I didn't see the use of having both), that way I wouldn't have sold my first gun which was also a perfectly good gun. I would have bought the Ruger KP90 instead of the 89 (my P89 was not the most accurate gun) or I would have skipped to the CZ or a Taurus right away (still similar prices, but I would have liked them more). My first lever rifle probably should have been a .357mag or .44mag so I could use it at the indoor pistol ranges and get more use out of it (I'd still get the 30-30, just later). I would have bought a CZ instead of the Remington, or I wouldn't have bothered with a bolt action .22 at all (I hate to say it, but I find them a bit boring). I would have tried to find a way to not sell the Mossberg (I should have started delivering pizza until I got a job) since it took a couple years until I got around to finally buying another shotgun- and I don't like my Benelli nearly as much as I liked that plain Jane Mossberg Persuader.