Hi Summer,
Short answer, yes, you can do all the GE courses through SDC (Study.com) and some of the AOS, provided you don't go over that maximum mentioned. The BA in Psych is completely alternative credit friendly.
If you are going to be in the 2020 catalog, then I think there are slight changes, such as The Institutes Ethics course comes in as 3 credits now (I rec'd 2)? If you chose to go that route, that is.
I fulfilled my Quant Lit requirement from CSMlearn, then the Statistics requirement through Sophia.org; the Oral Comm requirement through SDC Presentation Skills in the Workplace.
For my AOS, I am doing a combo of Coopersmith, SDC + 1 TECEP (since my enrollment is going to expire soon).
The ASNSM in CS is pretty much a freebie since I already had some CS courses completed from a different college, so I will graduate with that as well.
The best thing is to just start knocking out as much as you can and get the momentum rolling. Since you have the bulk of your degree still left to do, the GE's are going to take some time for you. The longer you wait to get started and fuss with planning, the longer it will feel. I suggest to just start knocking out your GE's and worry about AOS later. One of the mistakes I made, but it's worked out in the end.
I did the majority of my GE's through Sophia.org - when they have their sale that basically equals $100 per course, I bought a ton of them (almost their full catalog). While I LOVE Study.com, I needed to keep my schedule as flexible as possible (I need to stop coursework for long periods to care for my family or work becomes hectic or take the summer off), and Sophia.org is the only one that provided this for me as well as a user interface that I enjoyed. For AOS, Coopersmith will provide the same. I keep SDC courses to a minimum since it's pretty inflexible for me. You can follow JSD's plan to see what SDC offers instead if you're not interested in Coopersmith, but there are nuances to the AOS that you have to fulfill through a different provider since you need 15 credits that are UL and you cannot get them all from SDC. When you are ready, read this thread that explains this:
https://www.degreeforum.net/mybb/Thread-...#pid292810
I have attached my plan (which is for catalog 2019A) for you - I've highlighted all the courses that I obtained (or plan to) with alt credit. Hope it helps!!!
Happy Planning and good luck!