Need help with Installing OS after switching motherboards

would someone be able to help me tommrow if my mobo comes in to wipe my hard drives ssd and hdd aswell as put my os on my ssd? that's the only thing I haven't done and I'm not good at reading instructions on sites... please pm me if u cN help me!

You can easily wipe both drives with the installation disk.
If you installing windows just select the drive and delete volume, create new volume for both drives and install the Operating system on what ever drive you want.

I have a usb drive

What do you plan to install?
Windows 7, 8, 8.1. 10?
I hear Rufus is a great tool for making a bootable usb drive
https://rufus.akeo.ie/

I often use diskpart tool built into windows.
As long as you have access to the disk or .iso to install you can put it on the usb drive.
I don't know where you can find iso before windows 10 without a installation disk but you can always get windows 10 iso from here:

Direct download to Microsoft media creation tool
http://go.microsoft.com/fwlink/?LinkId=691209

Here is the link to download the Windows 7 iso if you have your key.
https://www.microsoft.com/en-us/software-download/windows7

I have windows 10 on a usb Bootable already just wanna clean my ssd and hdd and move my os onto the ssd

Oh okay, for most motherboards, to choose a boot device you can press F8 and a little menu will pop up, if you usb is plugged in, navigate with the arrow keys and click on the usb, sometimes you will have to select the one labeled with UEFI. Once booted into the installation, click custom install, now you should see the two drives, from there you can click on each drive and click the delete button, do this for the other drive.
This will delete the data on the drives.

Now once both are deleted, you want to click a drive and click the create button, this should create a new partition, you should do the SSD first, it may ask to create an additional partition for system files, if you want to transfer anything don't format the second drive yet.
You can always move stuff between the drives and then format the second drive later.

my head hurts can u just Skype me tommrow if I can finnish building? and guide me and have a good time lol

lol. I suppose depends what time, got work tomorrow.

like at night. idk if my mobo will even come