Constant anxiety

I am turning 30 on Saturday. I have pretty constant anxiety about aging. I do not mind the physical appearance but im worried for the future. I do not have a house, im a renter, and on my wage I dont think itll ever be possible. Im living abroad and can't use the housing system or loans here. I'm constantly worrying about how I can create a secure future for myself when everything costs too much. Everyone tells me to make a plan for the future but its hard because I can barely live now. I am afraid about if I lose my mobility and mind in the future. Im adopted and don't have contact with my birth or adopted family for several reasons I wont go into. It feels very isolating and alone. I also live in a different country than me own which doesnt have good elderly care, it relies on family to take care of you, and Im not planning on having kids (dont want to pass genetic illness on). Can anyone help me with how to plan for my future when I cant afford much and dont have much support. I do have amazing friends but they are similar ages and have their own problems.