oh i love new builds and in case any one has not stated already welcome!!!!!!!
ok so fist step in any tank read read read and when you have it all figured out keep reading LOL
i would suggest for firsts steps to get started grab some power heads and salt mix and then set up the tank where you are sure you want it with room to work on it front and back as time progresses so you can build slow...
as you are doing a slow build (i like this way myself) just get your water mixing in the tank and let it rock while you get the stuff you want....
live sand and live rock would go in next and again let it go
then depending on you the sump build and over flow
CUC (clean Up Crew)
then move along as you wish
mine took about 4 months to get the things i wanted and i am still working on my lights as i DIY "what i needed" not what i wanted and so the journey continues
here are some links to get you going and please check out a tone of member threads (mine included) many have started in much tha same way and its a great adventure
dont be afraid to Google more on the topic and get a good feel for the variances in ways it can be done... this hobby can be the 1 million dollar dump that works but has no feel or can be a DIY adventure that is yours alone by blending varying styles and techniques.......
welcome to the forum and to the salty adventure remember as a number of great members have often warned me nothing happens fast in a salt tank except bad things so go slow and take the time to understand each step as you do it......