There is no requirement that an executor must accept the executorship role, even if it was agreed to do so. But relinquishing executorship should be done as soon as practical if you don’t wish to act and have not dealt with the estate. You can resign your appointment as executor by renouncing your right to probate of the deceased’s will, that is you renounce probate.
To see the contents of a deceased person’s will can be difficult if you are not the executor. But in some states if you know who has the will, a copy, or other testamentary document, the law requires them to allow people who are entitled to have access, to inspect or see the will; and have a copy of it. Copying is at their own expense, but costs must be reasonable.