Damicci,
Judging from your blog, your japanese is pretty good for never having taken a class. I would place you around 2 semesters by my school's standard, although I noticed several grammatical mistakes. The biggest thing you have going for you is that you are practicing. You just need to avoid getting into those bad habits, I'll list a few for you to avoid in the future:
~~~
particles mistakes are common, your teacher will undoubtedly correct you on that. for example, 窶怒窶懌?凪?禿岩?昶?吮?堋「->窶怒窶懌?凪?堙俄?禿岩?昶?吮?堋「, ナステ披?堙?湘ヲ窶堙ゥ->ナステ披?堙可湘ヲ窶堙ゥ,
~~~
mixing the tenses, such as "窶堋?窶堙ィ窶堙懌?堋オ窶堋ス窶堙?スv窶堋「窶堙懌?堋オ窶堋スツ。" unless you are using separate clauses (such as something kedo something, etc), the grammar within a sentence must use the dictionary form (ie: 窶堋?窶堙ゥ窶堙?スv窶堋「窶堙懌?堋オ窶堋スツ。ツ)
for 窶堋「-adjectives, such as 窶堋「窶堋「ツ、窶堋ィ窶堋ゥ窶堋オ窶堋「ツ、窶禿岩?昶?吮?堋「ツ、ヒ?娯?堋「 etc, if you are using the casual form you do not want to add "窶堋セツ" after them, ツ×窶堋ア窶堙ェ窶堙坂?禿岩?昶?吮?堋「窶堋セ->窶堋ア窶堙ェ窶堙坂?禿岩?昶?吮?堋「. you can and should use 窶堙??堋キ if you are using the polite form
However, you want to avoid using the dictionary (casual) form at the end of a negative sentence with 窶堙??堋キ, like "ツ好窶堋ォ窶堋カ窶堙。窶堙遺?堋「窶堙??堋キ". either remove the 窶堙??堋キ altogether (to make the sentence casual), or to maintain the politeness of the sentence, use ツ好窶堋ォ窶堋カ窶堙。窶堋?窶堙ィ窶堙懌?堋ケ窶堙アツ。
~~~
ナ津??堋「 means old, but is only used for inanimate object. if you are referring to an "old friend" that you haven't seen in a long time, use ツ静娯?堙娯?認窶傳. You can also be more specific and say something like ツ坂?堋校窶堙固スナセ窶堙娯?認窶傳 (a friend from when I was in high school) or 窶堋オ窶堙寂?堙ァ窶堋ュ窶ーテッ窶堙≫?堙??堋「窶堙遺?堋「窶認窶傳 (a friend I have not met in a while).
~~~
when you said ヒ?ェナスナセナ?テ披?堙?スOツ十窶「ツェナ?テ披?堋イ窶堙ォヒ彙窶堋オ窶堙懌?堋オ窶堋スツ。 i had to stop for a second. to say you spoke for an hour and a half would be ヒ?ェナスナセナ?テ披?敖シヒ彙窶堋オ窶堙懌?堋オ窶堋スツ。(窶敖シ means half, if you wanted to say an hour and twenty minutes, it'd be ヒ?ェナスナセナ?テ披?愿アツ十窶「ツェ, no particle is necessary)
the word to approximate an amount of something (time, money, weight) is 窶堋ョ窶堙ァ窶堋「/窶堋ュ窶堙ァ窶堋「. 窶堋イ窶堙ォ is for about a certain point of time ヒ?ェナスナセ窶敖シ窶堋イ窶堙ォヒ彙窶堋オ窶堙懌?堋オ窶堋ス would be you talked at around 1:30, ヒ?ェナスナセナ?テ披?敖シ窶堋ョ窶堙ァ窶堋「ヒ彙窶堋オ窶堙懌?堋オ窶堋ス would be you spoke for about an hour and a half.
~~~
the use of 窶堋ア窶堙ェツ・窶堋サ窶堙ェツ・窶堋?窶堙ェツ・窶堙??堙ェ vs 窶堋ア窶堙個・窶堋サ窶堙個・窶堋?窶堙個・窶堙??堙 is a bit off in places;
"窶堋ア窶堙娯?堙最スdナス窶凪?堙?ス窶樞?堙固?テキ窶堙娯?ーツコ窶堙ーナ陳ゥ窶堙や?堋ッ窶堋スツ。" is a bit odd, it translates to (I found the underneath of my desk at work)
The use of 窶堋ア窶堙 requires a noun to follow it, like 窶堋ア窶堙娯?怒 or 窶堋ア窶堙娯?卩ス. 窶堋ア窶堙ェ translates to this one, and is treated like a noun itself.
I think you wanted to say 窶堋ア窶堙ェ窶堙最スdナス窶督湘ェ窶堙固スツゥ窶「ツェ窶堙固?テキ窶堙娯?ーツコ窶堙?陳ゥ窶堙や?堋ッ窶堋ス窶卩ス窶堙??堋キツ。(This is a bug I found under my desk at work)
~~~
The fact alone that you practice is a good sign; you have the motivation to learn. Once you fall out of those bad habits, the more complicated grammar structures will be much easier.