Driving Help 🚗

On Thursday I've got to do the biggest journey I've had to do since passing my test back in January. I've got to do around 100 miles in total and it's to the city for a funeral. Got to do it on my own and I think I'm going to avoid motorways (being summer holidays and they'll be stupidly busy). I'm so nervous, any tips to keep me calm and get me through it?!