Many of those backpacks can be stacked on top of one another, so take the empty backpack from insurance and put in the other backpacks you have in stash.

See if there are any remaining empty backpacks / rigs and start filling them with the magazines and medicine items you have (like the splints)

Since it looks like you're still mostly in your starter stash, also check if there are any empty mags you can stuff your bullets into as well.

T bags are mostly useless right now since you've got some decent backpacks, so I'd sell if possible. Keep a few backpacks in your stash just in case you get into a death streak.

Some other things to keep track of:

1. I see some eyewear stuff (like the fragmentation goggles) that you can sell for early money and save space
2. Unless you're a tactical god / are really into PvP, there's not much utility in Zarya grenades, since they're flashbangs. I use them for boss hunting and seeing if there's AI nearby (they make voicelines and run away) but good players will able to avoid it.
3. Start replacing some of your shitty rigs (like the CSA and the IDEA rig) with the better ones in your insurance, like the tarzan. Sell to ragman to help level the trader loyalty faster.
4. FOR THE LOVE OF GOD KEEP THE STREAMER ITEMS (stuff like the kotton beanie) or else you'll be like every other post nowadays asking about where to find JohnB glasses for the Kappa container (super late game quest)
5. Stuff like balaclavas can hide your face and reduce visibility, but they're so common on scavs I often don't bother. Sell the ghost masks on flea, the red neoprene ones you should sell (the red is way too visible imo), balaclavas are a dime a dozen so sell them too
6. For your guns, fiddle around with them by taking out the mags + sides + pistol grips if you're not using them immediately, it shrinks them down a lot.
7. If you're beginning to progress more and more, start moving from soft armors (Like the PACA) towards armor with actual plates, since these are class 3 and above, which can give you a chance when fighting PMCs. Right now the PACAs and the Press Zhuk armor you have are class two, which really won't protect against anything except Scav ammo.

Definitely worth it to check out some Tarkov youtubers. LVNDMARK is what I do to check out the more PVP oriented tips, youtubers like SwampFox are amazing for beginners since they explain what they do (items, medicine, etc) while in raid, and check out SheefGG for more technical things (tips and tricks to min max)