Can somebody explain how OCD manifests in their life?

I‘m 28 and diagnosed with depression and ptsd. It took me a while to figure out that some of my „being in Stress“ feeling is actually anxiety and I just stumbled over some ocd videos and now I’m wondering..

I’m wondering if that persistent rumination without coming to an conclusion and being stuck “because I really need to make sure I know everything and the best options“ before I start a task/hobby/vacation/buying a product, could be ocd?

I know that I’m perfectionistic as a try to prevent criticism but I never thought about ocd. So to the people with ocd: how does it looks like in your day? How does it interact with cptsd? And where does ocd start and what is just a “normal” way of preparing yourself?

thanks.