Just getting into brewing, been doing some cider and just bought an ipa extract kit, doing 5 gallon batches but have a couple questions before starting my first beer. The instructions say to soak the hops in bag while boiling wort then add more after fermentation. Most YouTube videos I’ve seen show people just put the hops right in wort with no bag, which way is better and which for the final hops in fermenter? Also would it affect the beer opening lid to put in hops also how do you get samples for gravity without adding oxygen by opening lid? Thanks been learning lots from reading these forums.