Guitar Slides and other translation problems

Hi All. I am trying to reproduce the guitar tab shown in this video.

https://www.youtube.com/watch?v=uXDhKOUZ_So&t=30s

My score is attached. I don't know what software Andy used to create his version but it clearly was not not MuseScore as there are several notations I cannot reproduce. I have several questions which I will address one at a time.

1. There are several spots where a hammer-on is indicated. How do you annotate a hammer-on in MuseScore?

2. There are lots of slides in this piece. I have tried several of the markings to indicate these but have not found the right way to do it. My score currently is using the glissando. This seems to work but on playback instead of a smooth slide it plays the notes in between the starting and ending notes. What is the "right" way to indicate a slide. Also note that when the slide involves 2 double stops, the first glissando goes in correctly, but the second ties the bottom note at the start to the top note at the end. I have fixed these by dragging the second endpoint to the proper note but it is a pain. Is there a way to not have to preform this edit?

3. Note that measure 48 has bends that bridge over the next note. Is there a way to do this in MuseScore?

4. Note that measure 39 has double stopped grace notes. I can add the first grace note OK. But when adding the second grace note MuseScore does not let me add it at the same timing mark. It wants to force it to the preceding timing mark.

Thanks for any help with this. I really want to learn to play this part.