you can use websites such as gumtree and do-it.org to find opportunities to volunteer online
depends what you’re wanting to do but you can use TSR or 7Cups (an online therapy/counselling/listening service) to volunteer too
best thing is to find something you’re interested in so you can balance it with your real life as often online commitments take a lesser priority over real life and you don’t want to be the reason online employers or online businesses lose out because you’re not active enough!
enjoy anyway x