‘Set Actor Location’ has a ‘Sweep’ option pin. If you set this to true, when it tries to move it will perform a collision sweep and stop if it hits anything. Note that if you are using a staticmesh for collision, it will need ‘simple collision’ added first (this can be done easily in the staticmesh viewer):
Or you can use a shape component (e.g. sphere component) for collision, and turn off collision for any graphics meshes attached to it.