is there a link with the general steps to go from schematic -> layout for analog designs?

It’s mostly a manual process but https://open-source-silicon.slack.com/archives/C016HUV935L/p1608650987015500

Automatic analog synthesis, placement and routing is a tough challenge. In the long run ALIGN-public ( = spice-netlist + pdk + user constraints -> gds ) will be an option : https://arxiv.org/pdf/2008.10682.pdf

I remember there was a video somewhere of someone going through all the steps in the sky130 process to design an op amp

You can check if this is helpful. https://github.com/yathAg/Physical_Verification_SKY130A This is one of our students repo who had done physical verification workshop with us