so i'm going to try and get this back on topic!
i saw someone else mention conditioner only washing plus adding a little colour to it to help it last, that's worked for me in the past so definitely give that a go!
i've had my hair literally every colour possible, and bleached it way too many times. one thing to remember is that bleaching really destroys your hair, and makes it harder for colour to even be absorbed into the follicle itself, so if you plan on changing your colour more then i recommend you start doing some deep condition treatments at least once a month to help repair after the bleaching, so your hair is ready to take on more colour as you go. there are heaps you can buy, i personally really like the TIGI dumb blonde conditioner (it's not a deep one, but its so thick you can just leave it on as one) but there are also lots of natural alternatives that work just as good!
a good and simple one is just a bunch of cold pressed virgin coconut oil lathered on and left overnight in a shower cap, it'll make your hair very soft and hydrated. you can also use olive oil, shea butter or any other very hydrating oil. another tip is to get yourself those gel vitamin e tablets and break those open into your oil mix. all these oils help your scalp too, which really is the key to strong and healthy hair.
if you're worried about grease build up inbetween washes (but to be honest i know bleached hair is so dry it is rarely an issue) a good dry shampoo can save you from washing and fading quicker than usual.
if you've read all this thank you haha, i hope your hair journey is amazing and i bet you look absolutely gorgeous! feel free to message me directly if you have any specific questions or just reply here!