Hey there Dreamcaster! (Love that name by the way)
Yeah I'd love to offer some tips. As far as that stuff I posted goes, for that album I tried to almost exclusively use samples from 90s and early 00s synths (since that's the era of PS1/2/Dreamcast). I would start with the Roland JD800 samples from this guy:
He sampled a bunch of 90s synth presets and offers them for donation based payment. He's great. I also like his Yamaha PSS samples too
And then lots of reverb on your synths. That's key for dreaminess/ambient.
You'll get a lot of the way there by doing that stuff