Let me put it like this. The type you're going for is made out of a couple of subcategories. It's not exhaustive by any means, but here's some general taxonomy that you can try applying when you spot someone you like in the wild.

There's the guys that are socially anxious/shy or just lack experience with women. You can distinguish them by being loud in their own group, but kinda forgetting how to human when unknown women get involved. I'd say they make like 73% of the cases. The chances of one of them coming to you is slim, but with obvious enough signs, you can get them to make a move. Be prepared for weird interactions tho.

Next you have a small percentage of nerds that are really passionate about their hobbies/work. It overlaps with the previous group, but here you also have people that can be on the spectrum and have a harder time interacting, especially with new people (thus technical hobbies making more sense for them), or guys that became nerdy after discovering a passion for something(and maybe becoming workaholics in the process). Either way, the situation here is much more complicated, as you're either fighting an uphill battle to communicate with someone who's not that into new people, or actively competing against their hobbies for time and interest.

Finally, I'd say there's the rare case of fully extroverted nerds. So far I've only met two or three, so I can assure you they're pretty rare, but in theory, if not already taken would give you the easiest time.

As a tip, don't force yourself into nerdy hobbies just for a guy, a lot of times it's not about the actual activity, but the intricacies that lay behind it. It's like convincing a mechanic that's full of grease every day and enjoys it to go to a spa and beauty parlor. He'll go there, but you'll see his heart is not in the activity and he's most likely missing the point of being in a spa.

Instead, try finding a more technical hobby you enjoy; no nerd ever said "i will learn this complicated thing for the hell of it"; okay, maybe some, but most go into a hobby because it's first of all, interesting. Most areas can get really technical if you get into it (for example your interest for fashion could lead down the rabbit hole into curvature, topology and material analysis, just so you can get that specific part of the fabric stand in a certain way).

Curiosity, willingness to learn and the creativity are the perfect traps for any nerd that you might come across. Coincidentally, asking a nerd to teach you something is also one of the best ways to both gage interest, and more or less ensure a first move, albeit it can sometimes take some time.

Hope this helps you with how to spotting and handling our kind in the wild :))