Hi Mohamed.
Welcome to Bytes.com. I have to say that the mere fact that you've read
How to ask "good" questions -- READ BEFORE SUBMITTING A QUESTION! shows you know how to approach a problem intelligently.
As an Access MVP who cares deeply about Access and what it can do, as well as someone who has an appreciation of computer systems over the years including many in the past where the lack of interoperability across the internet was a problem for flexibility where & when work could be done, I do understand that MS Access is very limited in that respect. Newer cloud-based applications are certainly more
sexy and offer far greater flexibility than MS Access when it comes to working from phones etc and other portable devices.
However - and this is extremely important in my view - please don't assume that this is the be-all & end-all of computer software. Some work requires more than most of these lighter weight apps can provide. Don't get me wrong, Excel and some other applications are very powerful in their own way and fully cloud enabled. Such software is
sexy, quite rightly, because it releases the user from various restrictions in how, when & where they can work. That's all great, but it should never be misunderstood to mean that flexibility of use is the only important factor.
MS Access handles large volumes of data from many different sources, both internal to a local network as well as external & cloud-based, and for the last 25+ years there's not been an application to touch it for manipulating and reporting on data from across a business.
In short. Yes. MS Access is still a very important application for at least someone to be able to use within a company. It isn't easy to use on portable devices and it doesn't currently scale too well in as much as it usually requires a fair amount of screen space, but its power and usefulness on a desktop system (It also works well on laptops of course.) is second to none.
As for where someone might start I'd be happy to point you to the website of a fellow MVP - who incidentally can be contacted for one-on-one training - that shows a number of resources that should help you to get started.
The link is
Microsoft Access Tutorials (Strive4Peace).
Best of luck in your journey :-)