>>1957791gearting anon here, its very simple! just count the number of teeth on the lowest front and rear sprockets and put those in a gear inch calculator to figure out what you should ideally have! for loaded touring you should have around 18 gear inches in your lowest gear.
alternatively you could just load it up and see how it feels
btw i think your bike will be fine for touring. low end shimano groupsets are plenty durable and reliable, theyre just not as light as the higher end stuff.
