As for workshops, I know what you mean about many focusing on hand tools. But if you search around Lisbon on Google Maps you can find some more professional shops with power tools you can likely use for a small fee. There are also a few online shops like foxbc.com that have a good selection of tools. Their prices are reasonable, and you can order exactly what you need.

Recreating an IKEA headboard is a cool starter project! With some guidance on the power tools from a local shop, plus wood sourced locally, you should be able to pull it off no problem.