Hello @davidding, to upvote yourself create another account. Use it to make your posts, and then vote those posts from this account. OR if you want to make posts with this account, you could create another account and delegate your SP to the other account and then use it to vote on your davidding account.
Probably the best thing to do if you want to be a hero around here, is set up another account, delegate your SP to it, and use it to upvote people like @randowhale or @booster does. In this manner, people pay you for the upvotes (so you make money there) and then you upvote them and they make $$ (and you still make some more on the curation) win win for everyone.
Randowhale charges 2 SBD. Once you do 100,000 votes you have all the money you invested in SP back. With randowhale, there is no guarantee youll get back more than you paid. Complete gamble. Ive never won. If you can offer a guarantee, you can shut out the competition and create a win win where everyone makes money with your vote. That would be something really useful for the community.
Emojis, yes they are a little tricky. You can make your own and include them as images as I do here. If you need help with that, let me know. Steemit. 