Note: Do not use Electrum wallets with two-factor authentication (2FA). You may think that 2FA for markets is good (which it is) so it must be good for Electrum. No. It requires you to bring your smartphone into DNM activities as well as install google apps on it which is the last thing you want for an anonymous DNM wallet. Plus your wallet will be secure enough if you keep your seed secure (e.g. written down on a piece of paper in a secret location and stored in a .txt file in your persistence directory, more on that later) and use KeePassX for your wallet password. Please just create a normal wallet as described in the following steps.
Setting up Electrum
Fortunately, the Zero Trace Pen already comes with a wallet installed. So everything you have to do is to set it up. To do this click on โApplicationsโ on the top taskbar and select the category โInternetโ. Then click on the โElectrum Bitcoin Walletโ entry in the list on the right.

If you get the warning that โPersistence is disabled for Electrumโ you either need to set it up first. so you do not lose your bitcoins. It should now start an installation wizard
First type the name you would like to give this wallet.
What kind of wallet do you want to create? โStandard Walletโ
Do you want to create a new seed, or restore a wallet using an existing seed? Choose โCreate a new seedโ
Choose a seed type โSegwitโ
You now get that new seed. As long as you remember that seed, you can always recover your bitcoins (even if you lose your password or when your Zero Trace Pen gets lost). So make damn sure that you either remember it or write it down somewhere where nobody else can find it.
Confirm Seed Now type in the seed you have remembered or written down.
Choose a password to encrypt your wallet keys Do not skip this step. Instead, choose a strong password using KeePass. In case you lose it, you can always restore your wallet with the seed and set a new password.
Almost done!
Now you just have to make a few changes in the settings. Go to โToolsโ -> โPreferencesโ
Under General Change โBase unitโ to BTC โZeros after the decimal pointโ to something like 5.
Under Transactions Check the checkbox for and the one for โEnable Replace-By-Feeโ. โUse multiple change addressesโ โOnline Block Explorerโ to blockchainbdgpzk.onion (You may need to scroll down to find it)
Now close the dialog by clicking on โCloseโ.