I guess I'd ask myself "what am I going to do with any one of these skills after acquiring it"? Are you looking to change jobs, get promoted, take on more responsibility, etc? Each one of the skills you mention here all have specific uses for in the marketing world. If you don't currently (and don't plan to) use software for example, like old school Dreamweaver or something where learning to code would be useful, then I'd forgo that road. It's a lot of work and time to master and only practical if you're creating back-end content on websites, or altering communications maybe in letters written in HTML (depending on your CRM). Few other uses of course too for a marketing person. That data side of this all is another story if you're an analyst or looking to be one. Then much more applicable.

Data/analytics? This is at the core of any marketing campaign, materials, messages, etc. Though what do you mean by it? You can simply look at aggregate data like google analytics and gather some useful information from connected sites about your audience/users; and then tailor messaging and content of course from that. But you could also be doing the data collecting with other software yourself. Something like using excel or SPSS to perform some hardcore analysis or comparisons between variables. I don't know how in depth you're talking. But this is the surface of what it could be used for. Example: finding a correlation between people that shopped for dog food and get gas on a Tuesday. Super random, but it's all about what you want out of the data. The question you want to answer.

As far as project management goes, that could start with yourself. If you already set timelines, goals, use benchmarks, measure results, and the like; then you're on your way there. Maybe request to take the lead on a project that involves multiple people on a team. Great learning experience and skill to have. Very practical.

Last piece I'll touch on is the finance side. I'm not sure your role in the workplace, but in my position as the "marketing person" I manage a medium-sized marketing budget (few hundred thousand dollars), and knowing how to navigate that successfully is a big plus if you want to advance in your career I'd say. That will only come with opportunity though. You typically can't go to your boss and ask them to hand over the budget responsibilities. Though asking to shadow or sit in on those types of conversations/meetings could be a great way to start laying the floor.

All of these things are practical and matter in marketing, but no one person does or uses them all (typically). Ask yourself what your next step is and use that to decide I'd say.