Welcome, and yes.
Edit: to find permitted routes for this journey, you can use Routeing Guide Map ST to find routes from Cheshunt to London. That gives you:
Hertford East-Cheshunt-Seven Sisters-Hackney Downs-London Liverpool Street
Hertford East-Cheshunt-Tottenham Hale-Clapton-Hackney Downs-Liverpool St
Hertford East-Cheshunt-Tottenham Hale-Stratford-Liverpool St
And with a season ticket, you can make as many journeys per day as you like, and any particular journey can start at any point, and end at any other point, on a permitted route (e.g. Liverpool Street-Stratford, Stratford-Hertford East, Hackney Downs-Cheshunt, Tottenham Hale-Broxbourne).