Yes I run my BitAxe on Ocean, you don’t need a node to do that, unless you want to define your own template in case you find a block.
If you want to get started quickly and easily with Ocean, then here are the instructions:
https://ocean.xyz/getstarted
Your Umbrel will allow you to mine with Ocean using your own block template using their DATUM protocol, discussed here:
nostr:nevent1qvzqqqqqqypzp6pmv65w6tfhcp73404xuxcqpg24f8rf2z86f3v824td22c9ymptqyv8wumn8ghj7enfd36x2u3wdehhxarj9emkjmn99uq3vamnwvaz7tmgd9ehgtnwdaehgu3wd3skuep0qqsp9mpmy4wjx9wjxdcpelvzqau7vz2pt5kr36qasgsx32x44geahvqz89pmp
Or if you want to solo mine with your own credentials, then @npub1wtgd9ccg76awlp29zl3h466l89wr7hsut0n3ucmtr95h4t29jc6srlsxp2 comes as an option with your Umbrel