Dear NK Sharma,
Why don't you make use of that special textbox for editors which is shown everytime you are submitting a new article? You can find it just below the area where you write your article.
I would like to inform you that I have fallen into both situations for which you are asking, therefore I want to forward the same suggestions to you that were given to me by ME Vandana ma'am and other editors.
Please note that while your article may be submitted for this time (just submit it and wait what editors have to say on it), you should try to divide the article into two parts. If required, you can provide clickable link in your article so that the readers can go the second part of the article.
Also, the use of Table tags is prohibited on ISC. The only way to show tables on ISC is to open the table on your computer, take a screenshot and use the same after required cropping in your article.
My suggestions come from my personal experience. My articles that have been long (around 3000 or more words) were advised to be split and my table tags were suggested to be removed by editors. It is for the betterment for our articles, let's hope for the best and find a way around.
(The best person to ask this would be from editors, hence I would suggest you to wait unless an editor responds)
"Your value does not decrease based on someone's inability to see your worth"