I’ve been struggling to find a good/comfortable position for my plucking hand, and was wondering if anyone had any tips for things to try or what I should be thinking about?
I’m not sure where the best place to rest my thumb is, and it always feels really clunky when I shift my thumb over the strings. I’m playing an Epiphone EB-3, which has the pickup right next to the neck, so I don’t know if that affects thumb/hand position at all?
All thoughts/hints/tips gratefully received 
Phil
I was having a hard time in this too.
A couple of things that I did to find a comfortable position was to raise the front strap attachment a little higher up… this also helped my fretting hand as well.
I also began to stand up while going through the lessons in order to try and find more comfortable positioning.
This worked for me but YMMV.
Hopefully you are not staying in one position permanently at least not on every songs.
I usually rest my thumb on the pickups or the top strings when it calls for. I love using Bass ramp so I rest on top of that.
Plugging toward the neck offers softer springing feel and warmer tone.
Plugging toward the bridge offers much firmer feel and brighter tone.
In general, beside playing over the bridge, I have about 6”-7” of play area from one pickup to the next. This offers a great range of tone.
I have ramps installed on several of my basses and I use that as the indicator of “plugging “ area.
Do you sand that leading edge/corner down? If not is it pokey? Do you get a line on your finger?
If I ever build a bass body I’m thinking of routing a channel in the body for my thumb. I haven’t built a rest yet but maybe I should start with that.
Yes the wood one I bought them I can’t make them, yet, 
. It’s also radius to follow the curve of the fingerboard.
Is there a reason for the radius? If imagine they would look better flat to match the pickups?
What do people pay for these? I haven’t seen too many I like maybe I’ll try my hand at designing some. To me they all look stuck on. If I made one is want to integrate it more with the pickups or pick guard so it fit the guitar better.
I’m also not sure that much beef is needed for just a thumb rest. Oh the ideas!!
If you are a ramp user it’s better with radius as it follows the curves of the string heights. The goal is to get a consistent feel under the string as the ramp prevent digging and promote finger speed.
It’s not cheap. It can be as pricey as $90
Thumb rest is not for everyone it’s definitely not for me as the are static and the traditional position is usually way too high. To be useful. Check out here 2 videos both are using the pickup as a ramp.
Billy Sheehan really gettin in to the reason and the result and benefits of ramps check it out
If you’re new to bass, everything will feel awkward 
I wonder if you could use it as an extended fretless fingerboard? 
On my Yamaha, the skinny pickups weren’t comfortable to anchor on, so I machined up a rest for it. On my Schecter the humbuckers are wide and I sit my thumb in the notch of the mounting screw.
Maybe I shouldn’t be so anchored, but for now I prefer it this way. Probably a hold over from my days of drag racing where consistency was key to everything.
There’s a fine line between being consistent and being stuck in a rut, but if you’re playing is progressing with use of an anchor point I’d say it’s the right thing to be doing at this moment.
Even if you could why would you want to do that? That’s jrange is quite awkward to play and it doesn’t sound all that good.
Cause I’ve never seen it done and it would be silly.
I just watched this video recently, and it has some good foundational pointers, including one about how to angle your fingers that I’d never heard before. Also a great channel in general.
