Once your baby has conquered sitting, it will seem like only minutes have passed before he's worked out how to get moving. Whether he's creeping - pushing himself around on his tummy - or scooting - shuffling forwards on his bottom - he'll figure out a way to get around on the floor. It may not look pretty but it gets the job done. As his upper body is stronger than his lower body, don't be surprised if you find him creeping backwards! With a bit of extra practice, he'll quickly work out what muscle groups will propel him forward. Creeping and scooting are fairly slow ways to get around and so he'll still work on developing the classic crawl action - and this will give you a chance to baby-proof the house!
With the introduction of solid food into your baby's diet, weaning your baby from the breast or bottle will inevitably happen - preferably at a gradual pace that suits both you and your baby. Ideally, weaning happens over months (or even years if you and your baby are keen on continuing breast feeding) so that your milk supply slowly decreases and you don't experience any of the discomfort associated with over-full breasts.
For the first couple of months of eating solid food, your baby will continue to get the majority of her nutrients from your breastmilk so continue to breastfeed as you normally would and always offer solids after a breastfeed - not before. Offering solids when she's really hungry (before a breastfeed) will have a huge impact on your milk supply as she will take more solid food and less milk.
If you didn't tackle expressing breast milk in the early days, you may consider it too late - and too bothersome - now to learn but if you're about to return to work after maternity leave, expressing is something you may want to consider as it allows you to continue to spend that beautiful skin-to-skin time with your baby first thing in the morning and again in the evening.