First time cycling trip,any suggestion please!thanksssssss

hello all，

my name is li hai, come from China. i will travel US next month.planing have a cycling trip from Seattle to Portland,i had biking experience only in the city.so i will see if i can handle this longer biking i will keep biking to San Francisco.This will be my first time to visit the United State.also will be my first cycling trip. I'm really looking forward this trip. but, in another side i must say.i do not think i know biking enough. do u have any tips for me in this route? another one thing i had a little bit worried is where can i stay in the night. bcs i'm alone.and have no idea about the route. i already prepared a tent and a sleep bag.do i need something else? is it expensive stay in a hostel?( i will travel in US almost 3 months ,i do not want spend too much money at first.)i'm a female if i camped alone is it safe? which way is cheapest? and how should i do if i wanna find a warm showers host me?

thanks thanks thanks

Best regards and thanks in advance for your help

li hai