Hi, and welcome to the forums.
The first advice I would offer you is to connect with the community here on Carer's forum. We are a caring group of people who help to walk impeach other through the trials of the day caring for family members with mi challenges, although some of us are (also?) self-carers with mi issues too.
The first rule of caring needs to be prioritising yourself as much as the person or people you are caring for .... and it is important, where possible, for them to acknowledge your needs too. Carer burnout is a real thing, so self-care activities need to be high on your to-do list somewhere.
Respite services help, so make use of any available.
Accessing a psychologist for your own carer support can be a smart move too - see your gp as a starting point. That is more a preventative measure for carers ...... helping to keep you out of anxiety or depression territory yourself as a consequence of the heavy emotional outlay it takes to support the ones you love.
I hope this helps.
🌷F&H