The top I think is quite aging, the ruffles are a bit “granny on holiday” and you might be a nana but you are not old.
the jacket I really like, I’m 37 and I’d wear it. The jeans are nice too but it’s all quite light. I think either wear a nicely fitted plain white t shirt or sightly darker jeans. M&S do nice t shirts.
Get the bag if you like it and will wear it again, but £60 on a new bag seems a bit mad when the whole outfit won’t cost much more than that. Personally I think a handbag you already own will probably be fine.
Have a look at some of the models on other websites and see if there’s anything you like that look of that you can imagine yourself wearing. I have to say it but I think the style of clothes at Matalan can be a bit “mumsy”