MBRFD -- "I just started as an RCA and am having difficulty completing my route in time. "
-- Nothing new with that. EVERYONE has trouble completing the route in the evaluated time when first beginning as an RCA. Experienced regular carriers also have difficulty in making evaluated time when taking over a new route.
-- When you work more than the route's evaluated time, you are giving the USPS free work. That is the USPS's way to "encourage" carriers to work faster. Working faster and not safer leads to accidents and mis-deliveries, which the USPS will say is entirely the carrier's fault. Just tell manglement that you are being thorough and methodical in your work to reduce errors.
-- Efficiency ( aka speed ) comes with repetition, repetition, and more repetition.
" Last Saturday I was told they can’t keep sending me help. "
-- Yes, they can! And will if they don't want to see the approximately $8,000 already spent on you to get you into the workplace go down the drain.
-- A couple of years ago, the new Postmaster General put out the word just before the holiday season started that RCA's are to be kept "at all costs". Have not seen any retraction of that statement by the PMG. Maybe you local manglement can clear that up when you ask them.
-- Whenever manglement stops by your case to remind ( harass ) you of your slowness, flat out ask them to provide suggestions to improve your speed. More than likely they have mentioned in passing of what great carriers they once were! Manglement often becomes tongue-tied when asked how to improve a carrier's work methods.
-- Taking DPS to the streets takes a while to find a "system" that work for you. Ask you fellow carriers for suggestions too. Observe how they "set up" mail in their vehicle.
-- Don't "finger the mail" between mail boxes as it puts you at risk of an accident.
" I have only managed to complete the entire route in time to get the outgoing mail back twice."
-- Making dispatch depends on several factors - scheduling, amount of mail to work, the number of parcels needing a dismount to deliver. That you have made it twice on your own is a positive accomplishment. Feel free to call or text manglement if you are running late so they can send someone out to get your collected mail.
-- During your probationary period ( 90 work-days or one year ), manglement can fire you for just about any reason and the union can't do much to help, so keep plugging away "by the book" so you don't give manglement any real reason to fire you. Another ploy being used is to offer an RCA a chance to "resign" instead of being fired. They will say by "resigning" you can reapply to work at the post office at a later date. If you get fired, manglement has to explain to higher-ups on the food chain why and that usually brings the PMG's edict into play. Something local manglement would prefer not to deal with. Getting fired is probably a good indication you probably would not like working for the USPS in any case.
-- This job is not for everyone, so give the job an honest effort over a couple of months.