Load multiple terminals and activate python virtual environments

Question

I'm working on something that requires me to run a few terminals, each with their own python virtual environment. This takes some time to open manually, so I would like to automate this setup by having a .sh file to handle it, and then leave them open ready for me to work with. I'm using Linux Mint 20.2.

For some reason I can't figure out how to write this script. I have tried various things including this:

#!/bin/bash

gnome-terminal -- /bin/sh -c 'cd ~/projects/proj/d1; exec bash'
source $(pwd)/venv/bin/activate
exec bash

gnome-terminal -- /bin/sh -c 'cd ~/projects/proj/d2; exec bash'
source $(pwd)/venv/bin/activate
exec bash

gnome-terminal -- /bin/sh -c 'cd ~/projects/proj/d3; exec bash'
source $(pwd)/venv/bin/activate
exec bash

(I am quite new to linux)

Edit: I've also tried gnome-terminal -- /bin/sh -c 'cd ~/projects/qcaas/qcaas_cloud; source $(pwd)/venv/bin/activate; exec bash', which just gives /bin/sh: 1: source: not found.