With my eldest we tried him on baby porridge (mainly banana and the berry one) and at 6 months we went on to try other veggies and blw
Ideally you need to wait until 6 months for baby led weaning, best to stick to purées if you’re starting before 6 months. You’re HV can offer you further support with it too 😊
I would probably start with baby rice or porridge in the mornings for a couple of weeks and then move onto the baby lead weaning. You probs already know but it’s recommended not to start until 6months as it can cause digestive problems later on (unless told to by HV/GP because of milk issues)