Do i stand a chance to make my work come up great

Hello everyone！it's been 10 days since (after) I registered at ITALKI. When I logged in/on it again today, I found there were some people (who were) looking for me to update my study working.
I am sorry for what I am missed, but I think I will keep updating about my work more frequently. 

I have something that I want to shareing with you on/about what I've been doing those (/these/the past 10 days) 10 days, I spent a week working daily and preparing for my customers who came from Australia to visit the factory. My engineer had some advice on the design they provided. So he had made some improvements which were really better for processing than the original design. But I am still worring about it, because my manager has another important project (for me) to deal with, and (so) there will be only me and my engineer (he doesn't speak (any) English) to receive the customers. and I feel nervous about it, Because this is my first time having a foreigner visitor, I am afraid if I can't (won't be able to) translate the idea of my engineer's new design to the customers (well). (I rewrote this sentence to make it sound better)

Finally, my customers arrived on Monday. We had discussed for about one hour. We introduced them the new design, and they asked (us) to send them email of the new design. After that we looked through the factory's operation. They seemed pleased with it, and soon they told me they are very busy for this business travel (or: they have a very busy schedule for their business travel), so they just took some photos of the factory and a few products and said/told us goodbye.

After they were gone, I sent an email of a PPT with comments on (of) the new design. Their visit was shorter than I thought it would be (<-- rewritten). I don't know what (else) I can do now than (but) waiting/to wait.

I am very confused with which tense I should use in my writing, I'd appreciated if anybody can help me with it! Thanks. :)

You did pretty well! Good job! Don't forget to write the word ''I'' with a capital letter at all times.

As to the tenses, if you give me your email I will send you a document on which tense to use in sentences. It's quite clear and understandable. 

If you have any questions on my corrections. Feel free to ask about it.

Good luck with your job and learning English better! :)