You already went digital. It just is not the right fit any more. Here is what moving to Pistonlog really involves, including the parts that do not come across.
Usually not because the old system broke. Because it stopped fitting.
Two weeks of running both, and one CSV. That is genuinely most of it.
Nearly every system will give you a CSV of customers and vehicles, usually somewhere under settings or reports. If you cannot find it, their support can do it for you. That export is all you need to bring across.
Download the template and paste your list into it. Customer name, business name, phone, email and address, then the registration, make, model, year, fuel, MOT date and mileage for each vehicle. Anything you have not got, leave blank.
Upload it and the server works out what it would do, then shows you. New customer, matched to one already in Pistonlog, or unclear. Nothing is written yet. Anything unclear stops the import rather than guessing which record you meant.
When the preview looks right, commit. It all goes in as one lot, so you never end up half imported. If it turns out wrong you have 24 hours to roll the whole thing back.
Finish the jobs that are already open where they are, and start every new one in Pistonlog. When the last old job closes you are done, and the old system becomes something you only keep for looking things up.
The three things that make a system easy to leave are the same three that make it safe to join.
The things garage owners actually ask, answered straight.
Set up an account, run a couple of real jobs through it, and only bring your customers across once you know it suits your garage.