Hi. Glad you're wanting to enter the wonderful world of cat ownership. There are lots of rescues all over the country who are overflowing with cats and kittens at the moment. Either check the CP website or look at the rescue pages on Catchat.
Just to warn you, you may have some problems... As standard, most rescues don't rehome cats to homes with children under 5 although I always find it depends on the individual family. From my point of view, it can work well with level headed, calm people but would definately recommend that you go for a cat who is used to children rather than a kitten for a number of reasons. Kittens can be very playful which means scratchy and bitey especially when they are going through the stage of testing out their teeth and strength so even though they may be very gentle, they may well end up injuring your baby. Kittens can also develop stress and behaviour problems when around loud noises and would get very upset and fed up with even the most animal- friendly child grabbing them which as someone who loves both children and cats, I know that is a natural thing for a child to do. The other thing is, a kitten takes up A LOT of time, they need lots of attention, training and care and can be like having another baby in the house when they are young.
Bringing an adult cat who is used to children into your home could be a wonderful thing for you and the cat. I hope you find something suitable