You can also find & watch various chiropractic videos on You tube etc.

The Nucca/upper cervical adjustment is the least scary of all.
just a very very very slight quick simple movement , you hardly know anything happened.

Mine didn't suggest ice, but he did do ultrasound before any adjustments for me.
I went to chiro for TOS/spasms and chronic myofascial tensions.
I had already read about taking it easy afterward before making the appt.
But heat for my neck area always feels better than cold.
Cold would tend to chill my muscles ans make for more tension.