In reply to Ian Jones:
I know INV Wall very well( I set the boulder wall for years ).
No auto belays and unlikely ever to be any due to lack of space.
No rope solo or rope ascension unless ticked off by management ( route setting course e.g )
im afraid you are going to have to stick to the boulder wall which has already been highlighted as limited and it is.
But it’s better than nothing on a rainy day( if it’s open, please check before you travel ) it will improve your climbing and you never know you might meet another likeminded shy person😁.
Good luck