Some simple measures can make it easier to write and read back your own writing, for example, using a pen with bold, black ink, good lighting, and thick-lined paper and other large print products, such as diaries. 
This pad of 100 white, thick-lined sheets of paper (100gsm) might be helpful. The A5 notepad is perfect-bound, has a teal blue cover, and approximately 11 lines per page (lines are 3mm thick and 19mm apart).