I drive on the motorways every day. My slip road tips :
1, If you can see that traffic is moving freely on the motorway, accelerate to 60, but don’t change up to top gear. You will find it easier to accelerate into a gap, if necessary, in a lower gear.
2, Signal your intention clearly well before you move. Most experienced drivers and truckers will make room for you if you let them know what you want to do. Communication with other drivers is very important on motorways.
3, Check your mirrors, obviously, but also always turn and look over your right shoulder. That way, you can be sure no other cars are in your blind spot. Then, match your speed and blend into the traffic in lane 1.
4, Don’t drive on the right-hand side of Left-drive European trucks. You will be sitting in the driver’s blind spot, and he won’t be able to see you.
5, Don’t drive too slowly. 60-65 is fine, but any slower and you will be forcing the truckers to sit on your bumper or overtake you which will be stressful for you and cause chaos for other road users.
6, Get out and practice when it quiet.