Other question is have you checked that the pole is safe to climb with a ladder? So of the things I needed to look at when I was a BT engr back in the 80’s – did all the overhead construction courses.
Are there any obstructions within a metre or so of the pole? I.e spiked railings and the like.
Is the pole buried in the ground deep enough, for example a BT pole will have a 3 metre mark on it which should be at about head height or lower when you stand next to it. Is there a D label on it, if so the pole testing crew have already been around and deemed it dangerous and in need of replacement, do not climb.
Is it rotten? Get a metal hammer and start tapping at regular intervals all round and from ground level, nice metallic ring is OK, dull thud and chances are its rotten and will only need a good push to get it over.