Start with "Fix Rounded Shoulders" and "Fix Anterior Pelvic Tilt" if you have not already done so. Plenty of great advice on YouTube on those topics.
It's odd to me you picked deadlift to call out as dangerous.
The deadlift is certainly dangerous, but only in the sense that almost any large lift is dangerous for the untrained. But in my experience, the deadlift is a very natural motion for me and most people who I've seen get into lifting heavy. Fixing people's natural instincts is usually just pointing out a few cues--if you look up deadlift workshops most are are only an hour long. And if you are lifting too much weight, you just drop it.
The squat is a much more complicated motion: squat workshops are usaully full-day events, and the ways it breaks down tends to change as you add weight, so just getting the form is a long-term process. It's also a more dangerous lift if you have too much weight because you're under the bar.
Deadlifting (and squatting) is arguably the most important full body exercise you can do, and the staple of every single marvel super hero body transformation, but the risk threshold is fairly high for a beginner.
If you want to stretch, try ROMWOD. A bit intense but likely the most impactful in terms of results.
Detailed workout guides and clear, simple visuals of proper form on hundreds of exercises.
Yes, they're not really a beginner exercise
> "Fix Rounded Shoulders" and "Fix Anterior Pelvic Tilt"
Build strength bit by bit instead of follow every Athlean-X nitpick ;)
This is just false. Sure, the untrained should get some instruction on proper form, and start with manageable weights, as with any exercise. But deadlifting is the least dangerous of the power lifts, and far less dangerous than half the activities in the average WOD.
> Start with "Fix Rounded Shoulders" and "Fix Anterior Pelvic Tilt"
Definitely don't. These are non-scientific maladies invented by fitness personalities to convince you to pay for their specialized expertise to fix your particular biomechanical imperfections. You don't need perfect posture as a prerequisite to benefiting from deadlifting, or any kind of exercise. If you're physically capable of doing the movement, even if your version of the movement is imperfect and not adhering to the mechanical ideal, you're able to benefit from it.
There are also more economical options like small group training classes.
Isn't that part of "acquiring" the skill; learning to do it?