Sooooo I said. Yes..n.We have not tackled the when(he would pefer it sooner) just the where and excatly how do you bring up mahr? ...what is normal? Would it be haram to have a walimah like a reception? I am the only Muslim in my family and there hasn't been marriage to celebrate in quite some time. I am nervously excited lol

sister,
Alhamdulillah, I am happy to hear that such opportunities are arising for you.
As the brother has advised, I would also suggest that you contact your local imam to assist you in this matter.
Reason being is that:
1. For all major decisions in life (and sometimes, even smaller ones), we should seek guidance from Allah (subhanawataála) first, by means of the istikharah prayer.
The wisdom behind this is that:
1. It is the sunnah of our prophet (sallalahu alaihi wasalam), so there can be only goodness for us by following his way, and it is a means of ibaadat (worship) as well.
2. Our knowledge is only limited to the past and present......while the knowledge of Allah (subhanawata'la) encompasses that of the future as well.
So, Allah alone knows what is best for us - there may be bad in what we perceive as good, and good in what we perceive as bad.
There are decisions that I have made in life, without reading istikarah and seeking the guidance of Allah, only to regret them later on (and I think many may be able to relate to this as well).
Perhaps, if I had first sought Allahs guidance, then things may have worked out differently....Allah knows best.
So, even though you have already accepted this proposal, in shaa Allah it is still not too late to sincerely ask Allah to guide you towards that which would be best for your imaan and aakhirah.
3. It would be more advisable that a male guardian accepts such proposals on your behalf, and who can then discuss the issues of the nikkah, mahr etc with the brother.
As you do not have a muslim relative to fulfill the task of a wali, then your local imam can stand in place in shaa Allah.
He may also be able to counsel the both of you regarding this lifetime journey (if Allah wills) that you plan to embark on, advise you how to actually read istikaraah salaah (and for the brother as well) and support you during this important time in your life.
My sister, marriage is a momentous decision in a persons life.
And the best of spouses are the ones whose hearts are attached to Allah (subhawataála) and His Nabi (sallalahu alahi wasalam), and those hearts who are detaching from this dunya (world).
With such a spouse, in shaa Allah, you cannot go wrong.
I pray that you take the time and the necessary measures before embarking on this journey.
And I pray that Allah Taa'la blesses you with a blissful, loving marriage that is founded upon imaan.
Ameen.
All the best sister.
Please let us know how it goes, and if we can help you in any other ways in shaa Allah.
BarakAllah feekum