Show 'cannot loan to yourself' in loan collateral calculation window

[grctest]

Is your feature request related to a problem? Please describe.
After creating a credit offer, in order to see the checkout page for the credit offer I have to login to a secondary account, as when I try to click the loan button I'm prompted with a warning that it's not possible to loan to myself.

Why check this page? To verify I've set the credit offer up properly; I have created at least a dozen invalid credit offers by not understanding it until I'd submitted it a few times and tried to buy the loan with a second account.

Overall the documentation and UX could be a bit more explanatory for both the credit offer creator and taker.

Describe the solution you'd like
Show the same window that everyone else sees, except just prevent me from submitting & show a text warning tooltip on the button or something.

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
YOLO don't check my credit offer details after creating it, who checks their work? Pfft /s 😉