The main thing is to keep an accurate record of your flying. In the early days, ask your instruct to talk you through how to complete the log properly and make sure your logbook agrees with what your training record says; it’ll save you a lot of hassle when it’s time to apply for your first licence. I prefer an electronic logbook as it is really easy to generate reports for the various totals often required by either the Authority or employer. There are plenty around that are fully compliant and accepted by the authority.
Finally, if you stick with the paper version, I would recommend recording your time in decimal (every 6 mins is 0.1) as it makes totalling the columns at the end of each page much easier.