As someone who has dealt with this issue for 30 years, be sure to cover and protect yourself well; don’t rely strictly on the umbrella to protect you.
My skin will actually burn and blister - and it feels like it is on fire - when I get too much UV exposure. I am covered head-to-toe any time between sunup and sundown, even when riding in the car. I should have taken out stock in sunblock companies years ago, however these days there are more options, like UV resistant* clothing, that help.
*resistant meaning that it helps with UV exposure - it does not guarantee 100% protection.