How do you transition into a PM role in climate/cleantech space without prior PM experience? ( i will not promote )

I've spent the last year at a London based climate startup in carbon markets, started as a research analyst and moved into a founder's associate role covering GTM and sales. Background is atmospheric science and physics, scientist turned salesperson. Along the way I've noticed a pattern in what I actually love doing. Talking to clients and helping them figure out their problems, digging into market research, and recently while working on a side project I completely lost track of time I was so invested in it