Shoot it stock first. Put 500 or so rounds down the pipe before you do anything. Then your mods will come not from what the internet experts say you need but what you have discovered you need. That said here are the lists of things I would do if you want to improve the pistol. Buy a set of Jerry Kuhnhausen's 1911 manuals. They are a great reference point.
https://www.amazon.com/Automatic-M1911-M1911A1-Pistols-Kuhnhausen/dp/B01896004C/ref=sr_1_2?crid=HF4QTXSVQ1X5&keywords=the+colt.45+automatic:+a+shop+manual+paperback&qid=1659304416&s=books&sprefix=the+colt+.45+automatic+a+shop+manual+paperback,stripbooks,107&sr=1-2
The number one thing you can do is to a proper trigger job. Here is a very good write up.
https://www.brownells.com/guntech/2-lb-trigger-pull/detail.htm?lid=10297
Getting a sear jig will help you get the angles correct. If you don't use a sear jig you are just guessing. I highly recommend John Harrisons tool which was designed by Chuck Warner. Do the trigger job on the OEM parts. There is a good chance that you will mess them up. If you do have a second set of nicer tooled steel parts for you second go. If you are not going to build more pistols in the future you can skip the sear jig and buy pre-prepped parts from Harrison, C&S, Ed Brown, Wilson etc.....
https://shop.harrisoncustom.com/hd-806-true-radius-pro-sear-stoning-jig
From there I would look to swap out the trigger and the thumb safety. Both of these are straight forward and can be done with nothing more than a file and set of polishig stones or buffer on a Dremel tool. Take your time and consider buying a back up part especially the thumb safety. That way when you over file the first part you don't have to wait to get a new one. Ask me how I know.
From there you can try your hand at installing a match bushing. That will be the best thing you can do on your own to improve the accuracy. You could try to fit a new barrel and bushing but that is more complicated but still doable.
From there you can do sight but unless you have a machine shop and can mill the slide you are most likely going to have to send that out or have a gunsmith do that work for you. If you are going to do that at the same time I would dehorn the pistol and have it refinished at the same time.
The reality is that by the time you do even just a few of these things you will have doubled the cost of your SDS. You will have learned about the 1911 and hopefully enjoyed the experience but the gun will still not be woth more than you paid for it NIB. I am not sure if that matters to you or not. None of theses things are going to "break" or ruin your pistol. The worst that can happen is you ruin a part. Have fun and good luck.