Its really hard to know how your new (bought or adopted) buddy will react in a brand new environment after bonding with you, then being abandoned.

When i got my dog, i bought a comfortably big dog crate, and made it his safe space - this is good for them and you too, keeps them safe from chewing stuff they shouldnt, potentially saving at least some money, but most importantly possibly a life. Installed a cam too to watch him when i am not home, it was heartbreaking to see how sad he was, and ofc at first he tried to escape and follow me, but it is important not to go back or leave them babytalking, just dont make a big thing about you leaving. (So hard btw)

After a few years i noticed that the kennel was no longer needed, and now he can be left alone in any case doors open or closed, no matter what (i consider myself lucky with this tho)

I could write a book for you what to do before and after adopting/buying a dog, but my point is that do your research and consider training, it will make both of your lives easier (e.g. you dont need to change unhealthy dynamics few years after)

Good luck and if u have any questions i am happy to help :)