I've been setting up, well trying to set up Electrum on my computer using the Electrum Windows Installer package and have been struggling but think I am nearly there.
The installation process itself is pretty straightforward after you download file from Electrum site. After you click on Electrum exe the installation process will begin and you will need to follow few steps.
First step is option how you want to connect to server and you should leave that on
Auto - connect, then you have choice to select name of wallet, and if you do not have in plan to have more then one just leave
default_wallet and click next.
In next step select
Standard wallet, then
Create new seed and you will get in next window 12 words which you should write down on paper and keep in safe place ( this is your backup). Before that you have option to select seed type, and you should go with
Legacy for start. There is option to
encrypt your wallet with password, and this is something you should do, but be sure to save that password with your seed words.
Now you have your wallet, and for start you can check
Tools tab and switch from mBTC unit to BTC only and select option that wallet is show also fiat value of your coins. To receive coins in wallet click
Receive tab, and copy / paste that address for example on exchange from where you will buy Bitcoins.
Pay great attention to safety, to download Electrum from official site, verify signature and that you have clean PC (malware / virus free).