I know Samourai but wasn't aware of Sentinel. Will take a look. Thanks!

That's like the worst choice imho. Sentinel is hardly maintained by Samourai and has many bugs, often times adresses aren't updated, or even show wrong balances. I would go for a simple view only wallet on either bluewallet or just mempool.space and bookmark the individual adresses of that wallet (if there aren't that many of course).