Hávamál 38:
"Away from his arms in the open field, A man should fare not a foot, For he never knows when the need for a spear Shall arise on the distant road." -Óðinn (Odin)
The one Weapon you always have is your Body.
All Combative styles depend on biomechanics. This is the science of the structure, movement, and functions of the body. There is no secrets or magic to martial arts. Only mastering these traits and applying them through techniques that make the most of it.
Because of this, the first step to Glíma mastery is building a healthy body. This is your weapon in combat and in life. As you develop, focus on understanding how and why things work the way they do, so you can develop an understanding of body mechanics, and develop your own style and creativity.
“No man has the right to be an amateur in the matter of physical training. It is a shame for a man to grow old without seeing the beauty and strength of which his body is capable.” -Socrates