verreli

Looks like the dimming period has ended and Betelgeuse is in the early stages of recovery?

Betelgeuse will still be of interest to the amateur astronomer. It's visual observation with a scope that's not recommended during the SN period. In addition to the spectroscopy that you mention, measuring the intensity of light over the weeks could be of interest. Daylight / widefield astrophotography could also make an interesting photographic subject / record of the event. Perhaps others could mention other ideas...

Betelegeuse is so far away that the photons arrive parallel from a point source in much that same way that photons are emitted from a laser. As has been stated above, it will likely gradually brighten rather than switch on so no danger of retina damage, thereafter there will be no detail to see so there's no point looking at it - so don't. A few years after it has faded away, it's likely to be the number one astronomy target as it grows and changes over time. Orion may miss a shoulder but we'll be left with something far more interesting to look at and scientifically significant as the final stages before and after supernova can be studied.