You can get a drop-in trigger blade from Welsh Willy (Woodfield Guncare Products). The rifle will still be crap, though.
If it's the Stoeger scope in the bundle, that will be crap too. The mildot blobs are so big, you won't be able to see a small target at 30 metres.
Go for a Weihrauch HW99s or HW30s and you won't regret it next week -- which you will do if you buy the Stoeger. The 30s can be delivered to your door from Holland for 159€ plus 20€ shipping, and you'd need to add a scope. https://www.db-schietsport.nl/en/air-guns/weihrauch-hw30s-45mm.html
what ft lb is the hw30