No. Both Shenfield and a lot of the stations towards Reading are outside the fare zones so a travelcard won’t cover them.
You could do the whole thing as a set of Oyster or contactless journeys if you’re going to leave each station when you get there (and you travel within the journey time limit each time). The only other alternative is a set of different paper tickets to cover the different legs of your journey but I’m not clever enough to know what tickets you should get for the cheapest travelling.