Tried to reply earlier but it seems not to have posted. Here's a fresh simpler reply. (You've already done some of these actions.)
Open a Money investment a/c called e.g. 212 ISA
Do it as an investment a/c and tick the tax exempt box.
Go into account settings, make sure it is ticked for "track cash transactions" and give the "cash portion" a name e.g. 212 ISA cash
Transfer cash from your bank account to 212 ISA cash.
Go into the 212 ISA a/c in money, select "investment transactions", click on new at the bottom, and enter details of your share purchase, selecting "buy" under "activity", and taking the money from 212 ISA cash.
Repeat for any new transactions.
Now look at portfolio manager (under the home tab).
Once you've sorted out the correct identifier for the share, Dan Gaier's absolutely indispensable programme will update the current value oof your holding whenever you want. Follow his setting up instructions carefully.
If you get dividends, you need to enter them manually as investment transactions. You can reinvest, or transfer the funds to 212 ISA cash and then withdraw or make a fresh purchase.
Pay Dan, it's worth far more than he asks for!