You can create your profile but have to get a score of 440+, to get an invitation. I would suggest you to retake IELTS and get L 8 R 7 S 7 W 7 atleast. Also you need to have 67 points in the six selection factors to be eligible.
You need not enter the spouse work experience in EE profile.But later add that during the PR application in the personal history section. Even if you have filled the experience in the EE profile, you can change it to personal history section during the PR application.
In my opinion, you have all the information available in the forums to apply on your own. The agents mostly just verify the documents you send to them, even that some of them screw up. Save your money, apply on your own.
Use IRCC Webform to update the profile, if you have your eAPR already. If it is only the EE profile you created, then you can edit it any number of times you want, unless it is locked after an ITA.
No your application will be paused, after all other steps, till you get your x-ray done. Once the baby is born and you provide docs for the baby and your x-ray, the final processing will take place. You can enter Canada only after the baby is born.
Yes you can complete a 1 year diploma and get points for two or more degrees. There is no requirement for the study period to be continuous. Also, make sure that the diploma is recognised by any one of the organisations giving your ECA.
If she has enough CRS points, then you have to renounce your PRs and apply via Express Entry. For renewal, you should have stayed in Canada for atleast 2 years in any 5 year period from your entry date.
No need to include the travel history between your country of origin and current country of residence. It is clearly mentioned in the website. I included my my entry stamp in to my country of residence and then didn't mention the subsequent travels.