I'm left handed, for the most part I only use the safeties in
guns that I can put an ambidextrous safety on (1911's and
browning hipowers).
This means the SIGs, S&W's, Beretta's and various military
surplus guns never have their safeties used.
I just keep my finger out of the trigger guard.
The only thing I can add to this thread is:
1. Buy some snap caps and practice cycling the gun with them.
2. Get about 5 more magazines (8 rounders if you can) and load
them. Then about once a week for a couple months pop the
rounds out and reload. This will remove a lot of stiffness in
them. And you'll have them on hand should the clowns in
Albany get another wild hair to restrict ownership some more.
3. While Smith still has the rebate going on check out one of
the peddlers and buy another Shield just like what you've got.
In a few years you'll still be happy you bought it when you did.
Examples right now of real good deals are:
S&W M&P Shield 9mm Magazine, 8rd Capacity ‒ 19936
Smith & Wesson M&P SHIELD 9mm ‒ 180021
I hope this is useful. By the way, welcome aboard.