When ill you can combine prayer, what about mental illness?

Hi

Revert, i find my iman has wanned alot (decreased) since reverting a few years ago.

Things happened in life and my depression and anxiety from PTSD got really bad, where I'd miss prayers.

I still listen to lectures and recite some verses of the Quaran, yet my depression makes it very difficult. I am alone, live alone so its easy for any shaytan influence, thus no doubt the decrease in imam and lack of salah.

To try and get back into it and defeat this shaytan that's on my back, got their hooks in me preventing salah, can I just combine the salahs? With the idea that due to the mental illness id put off a future salah. So at least if I combine whatever prayer I do, at least that should help me get back to normalcy?

Thanks