First thing, trust your instincts. They more often than not will know what will benefit you with spiritual work than the conscious mind will in my experience.
That being said if you want to take a more targeted approach to talismanic working it is best to research various forms of it.
The hermetic writings
How to Make and Use Talismans: Israel Regardie is a fairly simple intro text as far as the subject goes. The golden dawn has their own literature on the subject as well, same with alastor crowley but his stuff can be a bit of a maze to work through if you are new to things.
On the vedic side learning how vedic astrology and gemstones are related is another relate topic to talismans. Generally the stone selected it connected to your Dharma devvatta so it benefits you on an unconscious level but I’m sure there are other who have explored other options.
As for norse taking one of the runes and carving upon a small item you can carry or wear to use as a meditative focus while chanting it’s galdr is another avenue to explore.
There are also the hermetic planetary talismans made from the various square formula is you want to dig into a more technical aspect of it. Same with elemental talismans.
The simple way is to figure out what you need a talisman for, if you are already working with a tradition figure out what energies align with the goal and anchor those energies in a physical vessel that can saturate the aura over and be projected into the life experience over time.
The methods differ but the general end goals are similar.