im kinda iffy about grass runways at the minute, but all suggestions are welcome
Depends what's under the grass. Some grass airfields on a chalk base are no problem all year round.
Old Sarum is a good example.
How about Bembridge? Tarmac and feels like your first "foreign" flight as it's not attached to the mainland?
There should be some good flying this weekend but maybe take an instructor with you as it may be marginal VFR. You can fly in vis down to 3km and you'd be surprised just how low that is if all your training was done in +10km. It's worth getting confidence with weather below 10km just to avoid scrubbing flights because there is a cloud in the sky or <10k vis. I'm not suggesting you fly right to your own limits, but it's worth a "looksee" in say 5k's to see what the world looks like when you can only see less than two minutes flying time ahead of you.